Sigma-Aldrich
CHOLEST-4-EN-6-ONE
CHOLEST-5-EN-3-BETA-YL IODOACETATE
CHOLEST-5-EN-3-YL 4-METHYLBENZENESULFONATE
Copper-O.F.H.C.
Copper alloy
Copper selenide
Copper-beryllium alloy, Cu98Be2