for the following products
(2S)-2-{[(tert-Butoxy)carbonyl]amino}-4-(9H-fluoren-9-ylmethoxy)-4-oxobutanoic acid | Boc-L-Aspartic acid beta-9-fluorenylmethyl ester | N-alpha-tert-Butyloxycarbonyl-L-aspartic acid beta-fluorenylmethyl ester and Boc-Asp(OFm)-OH
