1H-非那烯

2-ethyl-7'-methyl-3',4'-dihydro-spiro[cyclopentane-1,2'-naphthalen]-1'-one

2-ethyl-1-(4-methyl-phenethyl)-cyclopentanecarboxylic acid

2-ethyl-1-(4-methyl-phenacyl)-cyclopentanecarboxylic acid

甲苯