for the following products
Boc-Asp(OBut)-OH.DCHA | Boc-Asp(OtBu)-OH·DCHA | Boc-L-Asp(tBu)-OH.DCHA | N-a-BOC-(b-O-tert-Bu)-L-Asp DCHA | N-alpha-tert-Butyloxycarbonyl-L-aspartic acid beta-tert-Butyl ester dicyclohexylamine and 4-tert-Butyl N-[(tert-butoxy)carbonyl]-L-aspartate dicyclohexylamine salt