Supplier Page from Thermo Fisher Scientific for (S)-alpha-Methyltryptophan hemihydrate, 98%, 98% ee
2-Ethoxyethyl ether, 98+%, extra pure from Thermo Fisher Scientific
9-Fluorenone, 99+% from Thermo Fisher Scientific
Ethyl 2-hydroxyethyl sulfide, 98% from Thermo Fisher Scientific
Ethyl cyanoformate, 99% from Thermo Fisher Scientific