12a-bromo-3-(dimethyl(phenyl)silyl)-3-methyl-7,12-dioxo-1,2,3,4,6,6a,7,12,12a,12b-decahydrotetraphen-8-yl acetate

2-bromo-5-methoxy-3-methylbenzaldehyde

2-bromo-5-methoxy-1-methyl-3-vinylbenzene

trifluoromethanesulfonic acid 4-bromo-1,8-dimethoxy-3-methyl-7,12-dioxo-7,12-dihydrobenz[a]anthracen-11-yl ester