methyl (1S)-2-((1S,2S)-2-hydroxycyclohexan-1-yl)oxy-1-methyl-2-cyclohexen-1-carboxylate

methyl 2-acetyl-2-methyl-5-oxopentanoate

(3S,8S,11S)-11-methyl-2,9-dioxa-10-oxotricyclo(9,4,0,03,8)pentadec-1(15)-ene

2-氧环己烷羧酸甲酯

(3S,8S)-2,9-dioxa-10-oxotricyclo(9,4,0,03,8)pentadec-1(11)-ene