(-)-(6S)-4,10-DIMETHYL-7-ISOPROPYL-1,5-DIOXASPIRO[5.5] UNDEC-3-EN-2-ON

(R)-(+)-甲基丁二酸

3-甲基己二酸

3-甲基-6-(1-甲基乙亚基)环己-2-烯-1-酮

(5R,6S)-6-hydroxy-5-methyl-2-(1-methylethylidene)cyclohexanone