Supplier Page from Thermo Fisher Scientific for 1-Aza-18-crown-6, 95%
2-Ethoxyethyl ether, 98+%, extra pure from Thermo Fisher Scientific
2-Fluorobenzoic acid, 99% from Thermo Fisher Scientific
Ethyl cyanoacetate, 98+% from Thermo Fisher Scientific
Ethyl oxalyl chloride, 98% from Thermo Fisher Scientific