Supplier Page from Thermo Fisher Scientific for Pyridine hydrobromide perbromide, tech. 90%
D-Cystine, 98% from Thermo Fisher Scientific
Hexanoic acid, 99% from Thermo Fisher Scientific
Methyl 4-(chloroformyl)butyrate, 98% from Thermo Fisher Scientific
trans-4-Hydroxy-L-proline, 99+% from Thermo Fisher Scientific