Synonyms: (3S,11S,11aS)-3'-Methoxy-4',9-dimethyl-3-[(2S,4S)-4-methyl-5-oxotetrahydrofuran-2-yl]-2,3,5,6,7,8-hexahydro-1H,5'H,10H-spiro[cyclopenta[b]pyrrolo[1,2-a]azepine-11,2'-furan]-5',10-dione; spiro[1H-cyclopenta[b]pyrrolo[1,2-a]azepine-11(10H),2'(5'H)-furan]-5',10-dione, 2,3,5,6,7,8-hexahydro-3'-methoxy-4',9-dimethyl-3-[(2S,4S)-tetrahydro-4-methyl-5-oxo-2-furanyl]-, (3S,11S,11aS)-