2H-Benzimidazol-2-one, 4-(3-((1,1-dimethylethyl)amino)-2-hydroxypropoxy)-1,3-dihydro- 4-(3-tert-Butylamino-2-hydroxypropoxy)benzimidazol-2-one 81047-99-6 Cgp 12177 Cgp 12177A Cgp-12177 Tbhpbo