Supplier Page from Thermo Fisher Scientific for 1-Chloro-5-trimethylsilyl-4-pentyne, 97%
2-Mesitylenesulfonyl chloride, 99% from Thermo Fisher Scientific
Benzalkonium chloride, alkyl distribution C8-C16, 50 wt% aqueous solution from Thermo Fisher Scientific
Methyl acetoacetate, 99+% from Thermo Fisher Scientific
Semicarbazide hydrochloride, 99+% from Thermo Fisher Scientific