Abstract
“Thuoc bong” or “Song doi” (Kalanchoe pinnata (Lam.) Pers or Bryophyllum pinnatum (Lam.) Kurz., Crassulaceae) is a medicinal plant and a traditional herbal remedy native to Vietnam. It is widely used in folk medicine for treating burns, stopping bleeding, and alleviating inflammation. A total of 82 scientific publications on the phytochemical constituents of various parts of K. pinnata were collected from two reputable databases (PubMed and Google Scholar) using the search terms “Bryophyllum pinnatum” or “Kalanchoe pinnata.” Altogether, 620 phytochemicals have been reported from K. pinnata, belonging to various classes such as bufadienolides, flavonoids, triterpenoids, volatile compounds, organic acids, and others. Additionally, studies on the development of quantification methods and quality control procedures for this medicinal plant were also included. This review provides a comprehensive overview of the chemical constituents of K. pinnata based on credible data sources, contributing scientific evidence to support the medicinal value of this traditional herb.
Introduction
Vietnam, known for its rich ecological diversity, is home to thousands of plant species with potential medicinal value. Historically, renowned Vietnamese physicians such as the Buddhist monk-physician Tue Tinh (fourteenth century) and Hai Thuong Lan Ong Le Huu Trac (eighteenth century) emphasized the use of indigenous plants in healing practices. Tue Tinh introduced the foundational concept of “Thuốc Nam” (Southern Medicine), advocating for the principle of “Southern medicine for Southern people,” which stressed the relevance of locally sourced herbal medicines suited to local physiology and climate. 1
Among the widely used medicinal plants in Vietnam is Kalanchoe pinnata (Lam.) Pers., Crassulaceae, also known as Bryophyllum pinnatum (Lam.) Kurz., Crassulaceae, locally referred to as “Thuốc bỏng” or “Sống đời.” This plant has been used traditionally for treating burns, wounds, inflammation, and infections. 2 Beyond its folkloric applications, recent pharmacological studies have confirmed a wide spectrum of biological activities, including anti-inflammatory, wound healing, antimicrobial, immunomodulatory, hepatoprotective, antioxidant, antidiabetic, and even anticancer effects. 3
The chemical composition of K. pinnata has only been reported by Assis de Andrade et al (2023), together with other Kalanchoe species, with most compounds belonging to the classes of cardiac glycosides and flavonoids. However, their search strategy was limited to only two databases, PubMed and SciFinder, using the keyword “Kalanchoe” up to April 2023, without including the synonymous nomenclature “Bryophyllum pinnatum.” 4 Therefore, conducted with the aim of updating the chemical constituents of K. pinnata (B. pinnatum) across a broader range of databases and systematically compiling the phytochemical profile of this medicinal plant, thereby providing a valuable foundation for future pharmacological and clinical research.
Methodology
All studies on the chemical constituents of various parts of K. pinnata, including isolation and analysis using modern techniques such as GC, HPLC, and quantification methods, were collected from for reputable databases (PubMed, Google Scholar, ScienceDirect, and Springer Nature) up to August 26, 2025. The search was conducted using the terms “Bryophyllum pinnatum” or “Kalanchoe pinnata.” Review articles and “gray” literature (conference abstracts, theses, and posters) were excluded during the selection process.
Phytochemical Constituents of K. pinnata
A total of 82 scientific articles were identified and collected from two online databases, reporting the presence of 620 phytochemical compounds. In general, the chemical constituents of K. pinnata fall into several major classes, including bufadienolides, flavonoids, triterpenoids, volatile compounds, organic acids, and others.
Bufadienolide Compounds
Phytochemical compounds with a bufadienolide skeleton represent an important group and are believed to contribute significantly to the pharmacological effects of K. pinnata. Bufadienolides are a class of steroidal compounds, some of which exist as cardiac glycosides when glycosidic sugar units are attached. However, to date, no studies have conducted the in vitro or in vivo cardiovascular effects of bufadienolides specifically isolated from K. pinnata. Existing evidence regarding cardiovascular effects has been limited to studies using crude plant extracts. Bufadienolides are structurally characterized by an aglycone skeleton with a steroidal backbone and a γ-pyrone ring at the C17 position.
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Unlike other cardiac glycosides, the bufadienolides found in K. pinnata lack a glycosidic linkage between the hydroxyl group at the C3 position and sugar moieties. Through our literature search, a total of 11 bufadienolide compounds (

Chemical Formula of Bufadienolide Compounds in K. pinnata.
Bufadienolide Compounds in K. pinnata.
*: The absolute configuration has not yet been described. Note: L: leaf, WP: whole plant, LC: liquid chromatography, I: isolation.
Although some earlier studies reported the presence of two additional compounds, bryotoxin A and bryotoxin B, in K. pinnata,15,16 these bufadienolides have only been confirmed in K. tubiflorum. 5 Therefore, they were excluded from this review. In addition to extraction and isolation studies, several bufadienolides from K. pinnata have also been evaluated for specific biological activities through in silico and in vitro approaches (Table 2).
Biological Activities of Bufadienolide Compounds.
Flavonoid Compounds
Flavonoids are a widely distributed and important class of secondary metabolites in nature. Chemically, flavonoids consist of a basic aglycone backbone structured in a C6-C3-C6 pattern, and they may occur either in free form (aglycones) or as glycosides when sugar moieties are attached. Depending on the condensation of the three-carbon chain with the C6 rings, the presence of a carbonyl group, and the double bond between C1 and C2 of the three-carbon chain, flavonoids are classified into smaller subgroups such as flavanols, flavanonols, flavones, flavonols, flavanones, anthocyanins, catechins, and others.25,26 In K. pinnata, a total of 75 flavonoid compounds (

Chemical Formula of Flavonoid Compounds in K. pinnata.
Flavonoid Compounds in K. pinnata.
Note. L: leaf, F: flower, R: root, AP: aerial part, WP: whole plant, I: isolation, LC: liquid chromatography, GC: gas chromatography.
The bioactivities of several flavonoid compounds are presented in Table 4.
Biological Activities of Flavonoid Compounds.
Triterpenoid Compounds
Triterpenoids represent a large group of plant-derived secondary metabolites, composed of six hemiterpene units (C5H8) condensed together. The biosynthesis begins with the coupling of two farnesyl pyrophosphate molecules to form squalene, which subsequently undergoes enzymatic cyclization and modifications to yield either linear or cyclic triterpenoids, including sterols.
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In K. pinnata, a total of 73 triterpenoid compounds (

Chemical Formula of Triterpenoid Compounds in K. pinnata. Note. Glc: glucose.
Triterpenoid Compounds in K. pinnata.
Note. L: leaf, F: flower, R: root, AP: aerial part, WP: whole plant, S: stem, I: isolation, LC: liquid chromatography, GC: gas chromatography.
Compound
Compounds
Volatile Compounds
With the advancement of modern chromatographic techniques, especially GC coupled with MS detectors, a wide variety of volatile constituents in medicinal herbs have been identified and reported, exhibiting great chemical diversity. A total of 381 volatile compounds (

Chemical Formula of Volatile Compounds in K. pinnata.
Volatile Compounds in K. pinnata.
Note. L: leaf, R: root, S: stem, LC: liquid chromatography, GC: gas chromatography.
Other Compounds
In addition, 80 other phytochemical compounds (

Chemical Formula of Other Compounds in K. pinnata.
Other Compounds in K. pinnata.
Note. L: leaf, R: root, AP: aerial part, I: isolation, LC: liquid chromatography, GC: gas chromatography.
Quality Control
In addition to studies on extraction, isolation, and chemical composition analysis, the literature also includes reports on the quantification of phytochemical compounds in K. pinnata, employing a wide range of techniques from basic analytical methods to advanced and complex instrumentation. Table 8 presents the results of quality control studies of the herbal material, while Table 9 shows studies on developing quantification procedures for compounds in K. pinnata.
Quality Control Studies of K. pinnata.
Note. GAE: gallic acid equivalence, QE: quercetin equivalence.
Studies on Quantitative Methods for Active Compounds in Kalanchoe pinnata.
Conclusion
Phytochemical studies have identified and reported 620 chemical compounds from the leaves, flowers, stems, roots, aerial parts, and whole plant of K. pinnata. These compounds belong to various classes, including bufadienolides, flavonoids, triterpenoids, volatile compounds, and others. In addition, several studies have been conducted to develop analytical methods for the quantification of these compounds in K. pinnata. Our review provides a comprehensive overview of the chemical constituents of K. pinnata based on reputable databases, thereby contributing scientific evidence to support the medicinal value of this plant. However, this review has certain limitations, particularly the exclusion of information from gray literature sources due to concerns regarding their reliability. Moreover, many chemical compounds identified in K. pinnata have not yet been studied for their biological activities. Further in-depth research on this medicinal plant is therefore warranted in the future.
Footnotes
Abbreviation
Acknowledgements
The authors declare that no specific funding was received for this research. All contributions to the study were made by the listed authors.
ORCID iDs
Author Contributions
Huyen Tran Ngoc Nguyen: methodology; formal analysis; investigation; data curation; writing – original draft preparation,
Minh-Nhut Truong: conceptualization; formal analysis; investigation; writing – original draft preparation,
Lac-Thuy Nguyen Huu: methodology; validation; data curation; writing – review and editing,
Nhu Huynh Mai: validation; data curation,
Chuyen Hong Thi Nguyen: investigation; formal analysis,
Diem My Vu: investigation; formal analysis,
Quan Minh Le: validation; writing – review and editing,
Vo Linh Tu: methodology; investigation,
Phuong Thuy Thi Tran: investigation; formal analysis,
Thai Minh Hoang: conceptualization; formal analysis,
Trung The Van: data curation; writing – review and editing; project administration; supervision.
Funding
The authors received no financial support for the research, authorship, and/or publication of this article.
Declaration of Conflicting Interests
The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
