222056-28-2
→
~43%
159181-77-8
1H-咪唑并[1,2-b]吡唑-6-羧酸乙酯
56290-86-9
Ethyl 3-cyano-2-oxopropanoate
N/A
159181-78-9
(9ci)-1H-咪唑并[1,2-b]吡唑-6-羧酸