Methyl[(1R)-2-(methylamino)-2-oxo-1-(phenylmethyl)ethyl]-carbamic Acid 1,1-Dimethylethyl Ester is an intermediate in synthesizing Tabimorelin Hemifumarate (T003505), an orally active growth hormone (GH) secretagogue intended for use as an alternative to daily injections of GH. In vitro studies in human liver microsomes have indicated that NN703 is a mechanism-based inhibitor of CYP3A4.