7-isopropylidene-2,3-dicarbomethoxynorbornadiene

2-Methoxy-2,5,5-trimethyl-Δ3-1,3,4-oxadiazoline

trans-3,4-bis(methoxycarbonyl)-3-chloro-5,5-dimethyl-1-pyrazoline

马来酸二甲酯

2,2,9-trimethyl-1,6-dioxa-3,4,9-triazaspiro[4.4]non-3-ene