Supplier Page from Thermo Fisher Scientific for Polyvinylpyrrolidone, average M.W. 1.300.000, K85-95
1-Ethynyl-1-cyclohexanol, 99+% from Thermo Fisher Scientific
Ethyl oxalyl chloride, 98% from Thermo Fisher Scientific
Farnesol, 96%, mixture of isomers from Thermo Fisher Scientific