61172-60-9
diethyl 2-acetamido-2-prop-1-ynylpropanedioate
→
100394-07-8
2-{[(Benzyloxy)carbonyl]amino}-4-pentynoic acid
50428-03-0
D,L-2-amino-4-pentynoic acid
+
501-53-1
氯甲酸苄酯