1,1-二羟基双环己基

ethyl 2-oxo-1-oxaspiro[4,5]decane-4-carboxylate

diethyl 2-nitrobutanedioate

5-氧代-2,5-二氢-1H-吡唑-3-甲酰肼

[1,1′-二环戊基]-1,1'-二醇