IUPAC:(1'S,2S,11'S)-3-methoxy-4,4'-dimethyl-11'-[(2S,4S)-4-methyl-5-oxooxolan-2-yl]-5H-10'-azaspiro[furan-2,2'-tricyclo[8.3.0.0^{1,5}]tridecan]-4'-ene-3',5-dione
IUPAC:(1'S,2S,11'S)-3-methoxy-4,4'-dimethyl-11'-[(2S,4S)-4-methyl-5-oxooxolan-2-yl]-5H-10'-azaspiro[furan-2,2'-tricyclo[8.3.0.0^{1,5}]tridecan]-4'-ene-3',5-dione