((S)-1-Methylcarbamoyl-2-phenyl-ethyl)-carbamic acid 3-azido-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-2-ylmethyl ester 3'-Azido-2',3'-didehydro-5'-O-methylamino-L-phenylalaninyl thymidine AIDS-092510 AIDS092510 Amino acid carbamate deriv