| Rifaximin impurity B 1351775-04-6
 | 
                    
                    
                        | Rifaximin 88747-56-2
 | 
                    
                    
                        | Rifaximin-d6 1262992-43-7
 | 
                    
                    
                        | Rifaximin 80621-81-4
 | 
                    
                    
                        | Aprepitant Impurity 15 1447693-83-5
 | 
                    
                    
                        | Fingolimod Impurity 4 177259-52-8
 | 
                    
                    
                        | Nifuratel Impurity 4 1445990-09-9
 | 
                    
                    
                        | Posaconazole Impurity 45 2723886-21-1
 | 
                    
                    
                        | Pixantrone Impurity B 144510-94-1
 | 
                    
                    
                        | N-(2,3-dihydro-1,4-benzodioxin-6-yl)-2-[[7-(2-methoxyphenyl)-8-oxo-[1,2,4]triazolo[4,3-a]pyrazin-3-yl]sulfanyl]acetamide 1223946-78-8
 | 
                    
                    
                        | {[7-(2-Methoxyphenyl)-8-oxo-7,8-dihydro[1,2,4]triazolo[4,3-a]pyrazin-3-yl]thio}acetonitrile 1223846-65-8
 | 
                    
                    
                        | N-(3-chloro-4-methylphenyl)-2-{[7-(2-methoxyphenyl)-8-oxo-7,8-dihydro[1,2,4]triazolo[4,3-a]pyrazin-3-yl]thio}butanamide 1223966-40-2
 | 
                    
                    
                        | Methyl 6-chloro-2-[(4-methoxybenzyl)amino]-3-nitrobenzoate 851659-04-6
 | 
                    
                    
                        | 7-(4-fluorophenyl)-3-((2-(4-(2-methoxyphenyl)piperazin-1-yl)-2-oxoethyl)thio)-[1,2,4]triazolo[4,3-a]pyrazin-8(7H)-one 1223963-01-6
 | 
                    
                    
                        | 3-((2-(4-(2-fluorophenyl)piperazin-1-yl)-2-oxoethyl)thio)-7-(4-methoxyphenyl)-[1,2,4]triazolo[4,3-a]pyrazin-8(7H)-one 1223958-27-7
 | 
                    
                    
                        | (2-Ethyl-4-hydroxyphenoxy)acetic Acid Ethyl Ester 403612-37-3
 | 
                    
                    
                        | 7-(4-fluorophenyl)-3-((2-(4-methoxyphenyl)-2-oxoethyl)thio)-[1,2,4]triazolo[4,3-a]pyrazin-8(7H)-one 1243088-45-0
 | 
                    
                    
                        | 3-((2-(2,4-dimethylphenyl)-2-oxoethyl)thio)-7-(4-fluorophenyl)-[1,2,4]triazolo[4,3-a]pyrazin-8(7H)-one 1242930-95-5
 | 
                    
                    
                        | [(8-Oxo-7-phenyl-7,8-dihydro[1,2,4]triazolo[4,3-a]pyrazin-3-yl)thio]acetonitrile 1223803-04-0
 |