Supplier Page from Thermo Fisher Scientific for Copper slug, 6.35mm (0.25in) dia x 6.35mm (0.25in) length, Puratronic:r, 99.9999% (metals basis)
4-Ethylresorcinol, 98% from Thermo Fisher Scientific
4-Fluorobenzyl chloride, 98% from Thermo Fisher Scientific
Ethyl 2-mercaptoacetate, 99% from Thermo Fisher Scientific
Ethyl pyruvate, 98% from Thermo Fisher Scientific