p. 6621 - 6624
(1991)(2R,3R)-2-((R)-2-Acetylamino-3-phenyl-propionylamino)-3-hydroxy-butyric acid
Acetic acid (2R,3R,4R,5S,6S)-2-((S)-2-{(R)-2-[(2R,3R)-2-((R)-2-acetylamino-3-phenyl-propionylamino)-3-hydroxy-butyrylamino]-propionylamino}-propoxy)-4,5-dimethoxy-6-methyl-tetrahydro-pyran-3-yl ester