1-(9H-carbazol-4-yloxy)-3-[[3-(9H-carbazol-4-yloxy)-2-hydroxypropyl]-[2-(2-methoxyphenoxy)ethyl]amino]propan-2-ol; 1,1'-[[2-(2-Methoxyphenoxy)ethyl]imino]bis[3-(9H-carbazol-4-yloxy)-2-propanol]; 3,3'-(2-(2-Methoxyphenoxy)ethylazanediyl)bis(1-(9H-carbazol-4-yloxy)propan-2-ol); Carvedilol Related Compound B (USP); Carvedilol Bis-carbazole