IUPAC:(1'R,2R,5'R,7'S,17'R)-7'-hydroxy-5',7'-dimethyl-4'-methylidene-2',9'-dioxa-14'-azaspiro[oxirane-2,6'-tricyclo[9.5.1.0^{14,17}]heptadecan]-11'-ene-3',8'-dione
IUPAC:(1'R,2R,5'R,7'S,17'R)-7'-hydroxy-5',7'-dimethyl-4'-methylidene-2',9'-dioxa-14'-azaspiro[oxirane-2,6'-tricyclo[9.5.1.0^{14,17}]heptadecan]-11'-ene-3',8'-dione