Supplier Page from Thermo Fisher Scientific for 3,5-Dimethoxy-4-hydroxycinnamic acid, 98%, predominantly trans isomer
4-Ethylaniline, 99+% from Thermo Fisher Scientific
Ethanethiol, 99+% from Thermo Fisher Scientific
Ethyl propiolate, 99% from Thermo Fisher Scientific
Flavone, 99+% from Thermo Fisher Scientific