IUPAC:(1'R,2R,4'R,5'R,7'R,8'R,11'R,13'S,17'S,18'S,19'R)-4',5',7',8',17'-pentahydroxy-14',18'-dimethyl-3',10'-dioxaspiro[oxirane-2,6'-pentacyclo[9.8.0.0^{1,7}.0^{4,19}.0^{13,18}]nonadecan]-14'-ene-9',16'-dione
IUPAC:(1'R,2R,4'R,5'R,7'R,8'R,11'R,13'S,17'S,18'S,19'R)-4',5',7',8',17'-pentahydroxy-14',18'-dimethyl-3',10'-dioxaspiro[oxirane-2,6'-pentacyclo[9.8.0.0^{1,7}.0^{4,19}.0^{13,18}]nonadecan]-14'-ene-9',16'-dione