(3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-yl {(1S,2R)-1-benzyl-3-[(3S,4aS,8aS)-3-[(tert-butylamino)carbonyl]octahydroisoquinolin-2(1H)-yl]-2-hydroxypropyl}carbamate AIDS-006335 AIDS006335 Ro 31-8959-bis-Thf deriv.