Chemical analysis of the stem bark of Erythrina sigmoidea Hua yielded two new flavonoids, designated sigmoidin M (1) and sigmoidin N (2). Their structures were established by chemical and spectroscopic means as 5,7-dihydroxy-3′-O-prenyl-(3″,4″-dihydroxy-2″,2″-dimethylpyrano)[5″,6″:4′,5']flavanone (1) and 5,7,3′-trihydroxy-(3″-hydroxy-2″-(1-hydroxyisopropyl)-[4′,5:4″,5″]furanoflavanone (2), respectively. Sigmoidin M exhibited antimicrobial activity.
GhediraK. (2005) Flavonoids: structure, biological activities, prophylactic function and therapeutic uses. Phytothérapie, 3, 162–169.
2.
HarborneJB, WilliamsCA. (2000) Advances in flavonoid research since 1992. Phytochemistry, 55, 481–504.
3.
KouamJ, EtoaFX, MabekuLBK, FomumZT. (2007) Sigmoidin L, A new antibacterial flavonoid from Erythrina sigmoidea (Fabaceae). Natural Product Communications, 2, 1105–1108.
4.
MarkhamKR, MabryTJ. (1975) In The Flavonoids, Part 1; HarborneJB, MabryTJ. (Eds) Academic Press: New York, pp 45–75.
5.
PromsatthaR, MbaforJT, TempestaMS, FomumZT. (1989) Sigmoidin F, a new prenylated flavonoid from Erythrina sigmoidea. Journal of Natural Products, 52, 1316–1318.
6.
NkengfackAE, KouamJ, VouffoWT, FomumZT, DagneE, SternerO, BrowneLM, JiG. (1993) Further flavonoids from Erythrina species. Phytochemistry, 32, 1305–1311.
7.
MabryTJ, MarkhamKR. (1975) In The Flavonoids, Part 1; HarborneJB, MabryTJ. (Eds) Academic Press: New York, pp 78–126.
8.
MataR, NavarreteA, AlvarezL, Pereda-MirandaR, DelgadoG, de VivarAR. (1987) Flavonoids and terpenoids of Chenopodium graveolens. Phytochemistry, 26, 191–193.
