Supplier Page from Thermo Fisher Scientific for 3-Amino-5-methylthio-1H-pyrazole-4-carbonitrile, 97%
Ethyl (ethoxymethylene)cyanoacetate, 98% from Thermo Fisher Scientific
Ethyl 3-aminobenzoate, 99+% from Thermo Fisher Scientific
Ethyl 3-aminocrotonate, 98.5% from Thermo Fisher Scientific
Ethyl oxalyl chloride, 98% from Thermo Fisher Scientific