Supplier Page from Thermo Fisher Scientific for 1-(4-Hydroxyphenyl)-5-mercaptotetrazole, 96%
Ethyl 2-bromoisobutyrate, 98% from Thermo Fisher Scientific
Ethyl 2-hydroxyethyl sulfide, 98% from Thermo Fisher Scientific
Ethyl L(-)-lactate, 97% from Thermo Fisher Scientific
Fumaric acid, 99+% from Thermo Fisher Scientific