Synonyms: 3-Oxaursane;2H-Chryseno[2,1-c]pyran, eicosahydro-4,4,6a,6b,8a,11,12,14b-octamethyl-,[4aR-(4aa,6ab,6ba,8ab,11a,12b,12ab,12bb,14aa,14bb)]-; [4aR-(4aa,6ab,6ba,8ab,11a,12b,12ab,12bb,14aa,14bb)]-Eicosahydro-4,4,6a,6b,8a,11,12,14b-octamethyl-2H-chryseno[2,1-c]pyran