4-Chloroacetoxy-8,9-[di(tert-butyl)silylenedioxy]-5,6,9'-trimethoxy-3'-methyl-6',7'-dihydrospiro[2H-benz[f]indene-2,8'-8'H-cyclopent[g]isoquinoline]-1,1'(2'H),3-trione

4-Chloroacetoxy-8,9-[di(tert-butyl)silylenedioxy]-3'-formyl-5,6,9'-trimethoxy-6',7'-dihydrospiro[2H-benz[f]indene-2,8'-8'H-cyclopent[g]isoquinoline]-1,1'(2'H),3-trione

3'-(diethoxymethyl)-1',6-dimethoxy-9'-(methoxymethoxy)-4,5,8,9-tetrakis(phenylmethoxy)spiro<2H-benzindene-2,8'-<8H>cyclopentisoquinoline>-1,3-dione

2-bromo-1,4,5,6,8-pentamethoxy-3-(phenylethynyl)naphthalene

7-(tert-Butyl-diphenyl-silanyloxymethyl)-4-hydroxy-5-methoxy-1,2,9,9a-tetrahydro-6-aza-cyclopenta[b]naphthalen-3-one