3a-phenyl-3,4-dihydro-2H-pyrrolo[5,1-b]benzimidazol-1-one STOCK6S-44752 3a-Phenyl-2,3,3a,4-tetrahydro-1H-pyrrolo[1,2-a]benzimidazol-1-one AIDS-136840 AIDS136840 NSC639847 NCI60_013270