p. 6335 - 6338
(2007/10/03)methylamine
2-(3-benzyloxycarbonylamino-2-tert-butoxycarbonylamino-propionylamino)-3-oxo-butyric acid methyl ester
3-{[(benzyloxy)carbonyl]amino}-N-(tert-butoxycarbonyl)-L-alanine
2-amino-3-oxo-butyric acid methyl ester