657405-10-2 2,5-Methano-5H,9H-pyrimido[2,1-b][1,5,3]dioxazepin-9-one,8-[(1E)-2-bromoethenyl]-2,3-dihydro-3-[[(methylsulfonyl)oxy]methyl]-,(2R,3R,5R)- 62921-38-4 (12Z,14E,24Z)-5,17,19-trihydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-1,6,11-trioxo-1,2,6,11-tetrahydro-2,8-(epoxytetradeca[1,11,13]trieno)[1]benzofuro[4,5-g]quinazolin-21-yl acetate