75-44-5
光气
+
6297-53-6
DL-蛋氨酸乙酯盐酸盐
→
52632-06-1
ethyl 2-isocyanato-4-methylsulfanylbutanoate
70779-91-8
ethyl 2-[(1-ethoxy-4-methylsulfanyl-1-oxobutan-2-yl)carbamoylamino]-4-methylsulfanylbutanoate