2,4-Pentanedione, 3-((3-(4,7-dihydro-7-oxo-1H-1,2,3-triazolo(4,5-d)pyrimidin-5-yl)-4-propoxyphenyl)azo)- 2-(5-(2,4-Dioxopent-3-ylazo)-2-propoxyphenyl)-8-azapurin-6-one 67012-85-5