1-Piperidinecarboxylic acid,3-[[cyclopropyl[3,4-dihydro-4-(3-methoxypropyl)-2,2-dimethyl-3-oxo-2H-1,4-benzoxazin-6-yl]amino]carbonyl]-5-[(2-phenylacetyl)amino]-,9H-fluoren-9-ylmethyl ester, (3R,5S)- [ 920297-07-0 ]