2-环庚烯-1-酮

甲基锂

9-hydroxy-10-methoxy-9-methyl-3,4,9,10-tetrahydrophenanthren-1(2H)-one

1,4-Dioxaspiro[4.6]undec-7-ene-7-carboxylic acid, methyl ester

3-Methyl-7-carbaethoxy-cyclohepten-(2)-on