.Beta.-D-Allopyranoside, phenylmethyl 2,3-diamino-2,3-dideoxy-4-O-(phenylmethyl)-, 6-(phenylcarbamate) AIDS-107067 AIDS107067 Phenyl-carbamic acid, (2R,3S,4S,5R,6R)-4,5-diamino-3,6-bis-benzyloxy-tetrahydro-pyran-2-ylmethyl ester