1-bromo-2-iodo-3,6-dimethoxybenzene

2,3-dihydro-7-methoxy-1H-indene-1-spiro-2'-(-4',7'-dimethoxy-2H-inden-1',3'-dione)

2,3-dihydro-7-methoxy-1H-indene-1-spiro-2'-(3'-benzylidene-4',7'-dimethoxy-2H-inden-1'-one)