Abstract
Five new guaiane type sesquiterpene lactones; 6β-hydroxy-guai-9(10)-en-12,8β-olide-4β-O- 1 -glucopyranoside (1), 6 β-acetoxy-guai-9(10)-en-12,8 1 -olide-4 β-O-β-glucopyranoside (2), 5α,10β-dihydroxy-guai-1(2)-en-12,8β-olide (3), 4β-hydroxy-guai-(2)-en-12,8β-olide-10-O-β-glucopyranoside (4a), 1α,4α,10α-trihydroxy-guaian-12,8β-olide (5) were identified in the repeated examination of the aerial parts of the Chrysophthalmum montanum (DC) Boiss. lie structures of the isolated compounds were elucidated by extensive 1D- and 2D-NMR spectroscopic analyses in combination with HRESIMS experiments.
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