Supplier Page from Thermo Fisher Scientific for (+)-1,2-Bis[(2R,5R)-2,5-diethyl-1-phospholanyl]ethane, 97%
1,3-Diphenylguanidine, 97% from Thermo Fisher Scientific
Acetophenone, 98%, pure from Thermo Fisher Scientific
Finasteride from Thermo Fisher Scientific
Tetraphenylphosphonium chloride, 98% from Thermo Fisher Scientific