for the following products
Boc-L-Pen(MBzl)-OH.DCHA | Boc-Pen(4-MeBzl)-OH.DCHA | Boc-Pen(Mbzl)-OH . DCHA | Boc-Pen(pMeBzl)-OH | N-alpha-tert-Butyloxycarbonyl-s-(4-methylbenzyl)-L-penicillamine dicyclohexylamine and N-alpha-tert-Butyloxycarbonyl-S-(4-methylbenzyl)-D-penicillamine dicyclohexylamine
