(2S)-3'-formyl-4,5,6,8,9,9'-hexamethoxy-6',7'-dihydrospiro[2H-benz[f]indene-2,8'-8'H-cyclopent[g]isoquinoline]-1,1',(2'H),3-trione

5,8-bis(methoxymethoxy)-9,9'-bis(phenylmethoxy)-6',7'-dihydro-4,6-dimethoxy-1'-ethoxy-3-hydroxy-3'-(1'',3''-pentadienyl)spiro<2H-benzindene-2,8'-8'H-cyclopentisoquinolin>-1(3H)-one

(R)-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]-1',5,6,9'-tetramethoxy-3'-methyl-6',7'-dihydrospiro[2H-benz[f]indene-2,8'-[8'H]cyclopent[g]isoquinoline]-1,3-dione