N-{N-[N-(1,1-Dimethyl­ethoxy­carbon­yl)-l-leuc­yl]-N-methyl-l-leuc­yl}-N-methyl-l-leucine benzyl ester

The tripeptide title compound, C(32)H(53)N(3)O(6), synthesized in 80% yield by coupling of N-methyl-l-leucine benzyl ester with tert-butoxy­carbonyl-l-leucyl-N-methyl-l-leucine at 273 K, conjugates through two amide linkages and includes two protecting groups: a tert-butyl­oxycarbonyl group at the C-tip and a benzyl group at the N-tip. A classical inter­molecular N—H⋯O hydrogen bond and a weak non-conventional inter­molecular C—H⋯O contact connect the mol­ecules, forming layers parallel to (001).