Cytotoxic ent-abietane diterpenoids from the leaves of Croton crassifolius
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Two new ent-abietane diterpenoids, 2β,15-dihydroxy-ent-abieta-7,13-dien-3-one (1) and 6β,13α-dihydroxy-ent-abieta-8(14)-en-3-one (2), together a known ent-abietane diterpenoid 3α,7β-dihydroxy-ent-abieta-8,11,13-triene (3), were isolated from the 80% aceto... ...
