2-{(1S,2S,4aR,8R,8aR)-8-Hy­droxy-4a,8-dimethyl-1-[(2E)-2-methyl­but-2-eno­yl­oxy]perhydro­naphthalen-2-yl}acrylic acid from Sclerorhachis platyrachis

Abstract

The eudesmane-type terpenoid, C20H30O5, isolated from Sclerorhachis platyrachis, has a deca­lin skeleton whose six-membered rings adopt chair conformations. The two methyl substituents occupy axial positions, whereas the other three substituents occupy equatorial positions. The hy­droxy group is an intra­molecular hydrogen-bond donor to the single-bond ester O atom; adjacent mol­ecules are linked through the carb­oxy­lic acid interacting with the hydroxyl group, forming a hydrogen-bonded chain running along the c axis