156429-10-6 FL-120A Propanoic acid, 2-methyl-, 1,3-bis(acetyloxy)-11-diazo-2,3,4,5,10,11-hexahydro-4,9-dihydroxy-2-methyl-5,11-dioxo-1H-benzo(b)fluoren-2-yl ester, (1R-(1-alpha,2-alpha,3-beta,4-alpha))-