label: N(2)-[(benzyloxy)carbonyl]-N(1)-((3R)-1-{N-[(benzyloxy)carbonyl]-L-leucyl}-4-oxopyrrolidin-3-yl)-L-leucinamide
label_lc: n(2)-[(benzyloxy)carbonyl]-n(1)-((3r)-1-{n-[(benzyloxy)carbonyl]-l-leucyl}-4-oxopyrrolidin-3-yl)-l-leucinamide