IUPAC:(1'S,2R,2'S,4'S,7'S,8'R,9'S,12'S,13'R,14'R,16'R)-7',9',13'-trimethyl-5-methylidene-5'-oxaspiro[oxane-2,6'-pentacyclo[10.8.0.0^{2,9}.0^{4,8}.0^{13,18}]icosan]-18'-ene-14',16'-diol
IUPAC:(1'S,2R,2'S,4'S,7'S,8'R,9'S,12'S,13'R,14'R,16'R)-7',9',13'-trimethyl-5-methylidene-5'-oxaspiro[oxane-2,6'-pentacyclo[10.8.0.0^{2,9}.0^{4,8}.0^{13,18}]icosan]-18'-ene-14',16'-diol