Supplier Page from Thermo Fisher Scientific for Bis(tri-n-butyltin) oxide, 97%
4-Bromobutyric acid, 98% from Thermo Fisher Scientific
L(+)-Lysine monohydrochloride, 99% from Thermo Fisher Scientific
L-Alanine, 99% from Thermo Fisher Scientific
Semicarbazide hydrochloride, 99+% from Thermo Fisher Scientific