((2R,3S,4S,5R,6R)-5-Amino-4-azido-3,6-bis-benzyloxy-tetrahydro-pyran-2-yl)-methanol .Beta.-D-Allopyranoside, phenylmethyl 2-amino-3-azido-2,3-dideoxy-4-O-(phenylmethyl)- AIDS-107066 AIDS107066