22,29xi-Epoxy-30-norhopane-13beta-ol 5a,5b,8,8,11a,13b-Hexamethyl-3-oxiranyl-octadecahydro-cyclopenta[a]chrysen-13a-ol InChI=1/C29H48O2/c1-24(2)12-7-13-25(3)22(24)10-15-27(5)23(25)11-17-29(30)26(4)14-8-19(21-18-31-21)20(26)9-16-28(27,29)6/h19-23,30H,7-18H2,1-6H3/t19-,20?,21+,22?,23?,25-,26-,27+,28-,29-/m0/s rel-(3R,5aR,5bS,11aR,13aR,13bR)-5a,5b,8,8,11a,13b-hexamethyl-3-[(2R)-oxiran-2-yl]icosahydro-13aH-cyclopenta[a]chrysen-13a-ol (non-preferred name)