Supplier Page from Thermo Fisher Scientific for (R)-(+)-Tetrahydro-2-furoic acid, 98+%, ee 98%
Ethyl 3-hydroxybutyrate, 99% from Thermo Fisher Scientific
Ethyl 4-chlorobutyrate, 97% from Thermo Fisher Scientific
Ethyl oxalyl chloride, 98% from Thermo Fisher Scientific
Ethyl propiolate, 99% from Thermo Fisher Scientific