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

7-Methoxy-indan-1-carboxylic acid methyl ester

7'-methoxy-2',3'-dihydrospiro[cyclopentane-1,1'-inden]-3-ene-2,5-dione

(7-Methoxy-indan-1-yl)-(2-phenylethynyl-phenyl)-methanone

(7-Methoxy-1-phenylselanyl-indan-1-yl)-(2-phenylethynyl-phenyl)-methanone