(S)-N-(5,6,7,9-TETRAHYDRO-1,2,3,10-TETRAMETHYLOXY-9-OXOBENZO[A]HEPTALEN-7-YL)BUTANAMIDE 86436-36-4 Butanamide, N-(5,6,7,9-tetrahydro-1,2,3,10-tetramethyloxy-9-oxobenzo[a]heptalen-7-yl)-, (S)- NSC343493