Acetamide, N-[2,3-bis(acetyloxy)-5,6,7,9-tetrahydro-1-methoxy-10-(methylthio)-9-oxobenzo[a]heptalen-7-yl]-, (S)- Acetamide, N-[2,3-diacetyloxy-5,6,7,9-tetrahydro-1-methoxy-10-(methylthio)-9-oxobenzo[a]heptalen-7-yl]- NSC374980