68295-48-7
1,2,3,5,6,7-hexahydropyrrolizine-8-carbonitrile
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412283-63-7
四氢-1H-吡咯嗪-7A(5H)-羧酸
78449-71-5
ethyl 1,2,3,5,6,7-hexahydropyrrolizine-8-carboxylate