Hydrochloric Acid → 5-Cyanomethyl-6-ethyl-pyridin-3-yl-acetic acid methyl ester

Reaction equation

[CH3:1][O:2][C:3]([CH2:4][c:5]1[cH:6][n:7][c:8]([CH2:14][CH3:15])[c:9]([CH2:11][CH:12]=[O:13])[cH:10]1)=[O:16].[CH3:20][CH2:21][N:22]([CH2:23][CH3:24])[CH2:25][CH3:26].[CH3:38][C:39]#[N:40].[ClH:17].[NH2:18][OH:19].[O:27]=[C:28]1[c:29]2[c:30]([cH:31][cH:32][cH:33][cH:34]2)[C:35](=[O:36])[O:37]1.[OH2:41]>>[CH3:1][O:2][C:3]([CH2:4][c:5]1[cH:6][n:7][c:8]([CH2:14][CH3:15])[c:9]([CH2:11][C:12]#[N:22])[cH:10]1)=[O:16]