Supplier Page from Thermo Fisher Scientific for Betaine hydrochloride, 99%, extra pure, specified according to the requirements of USP
Ethyl 4-bromocrotonate, 75%, tech from Thermo Fisher Scientific
Ethyl 4-chlorobutyrate, 97% from Thermo Fisher Scientific
Ethyl picolinate, 99% from Thermo Fisher Scientific
Ethylene carbonate, 99+% from Thermo Fisher Scientific