(+)-Azaspiracid-1

(+)-Azaspiracid-1

(4E)-5-[(2R,3aS,5S,5′S,6S,6″S,7aS)-2-{(S)-Hydroxy[(2S,3S,5R,6R)-2-hydroxy-3,5-dimethyl-6-{3-[(1′S,2R,2′S,3R,5S,6′S,8′R,10′R)-3,5,10′-trimethyl-8′H-spiro[piperidine-2,4′-[3,7,12]trioxatricyclo[6.3.1.0 ~2,6~]dodecan]-8′-yl]-1-propen-2-yl}tetrahydro-2H-pyran-2-yl]methyl}-6-methyl-2,3,3′,3″,3a,4′,6,6″,7,7a-decahydrodispiro[furo[3,2-b]pyran-5,2′-furan-5′,2″-pyran]-6″-yl]-4-pentenoic acid