... , large quantity, competitive price Bortezomib Intermediate; (aR,3aS,4S,6S,7aR)-Hexahydro-3a,8,8-trimethyl-alpha-(2-methylpropyl)-4,6-methano-1 ... %Assay (HPLC)≥98.0% Bortezomib Intermediate; (aR,3aS,4S,6S,7aR)-Hexahydro-3a,8,8-trimethyl-alpha-(2-methylpropyl)-4,6-methano-1 ...