niperotidine niperotidine niperotidine is a histamine antagonist selective for the h2 subtype. it was studied as a treatment for excessive gastric acidity, but withdrawn after human trials showed liver damage. niperotidine names preferred iupac name (z)-n1--n′1-methyl)sulfanyl]ethyl}-2-nitroethene-1,1-diamine identifiers cas number 84845-75-0 y 3d model (jsmol) interactive image chembl chembl1909284 n chemspider 11644617 n echa infocard 100.076.612 ec number 284-304-0 kegg d07072 y mesh c073716 pubchem cid 3033952 unii 12jbd7u72k y inchi inchi=1s/c20h28n4o5s/c1-23(2)11-16-4-5-17(29-16)13-30-8-7-21-20(12-24(25)26)22-10-15-3-6-18-19(9-15)28-14-27-18/h3-6,9,20-22h,7-8,10-14h2,1-2h3 nkey: vzpxhgjteapnaa-uhfffaoysa-n ninchi=1/c20h28n4o5s/c1-23(2)11-16-4-5-17(29-16)13-30-8-7-21-20(12-24(25)26)22-10-15-3-6-18-19(9-15)28-14-27-18/h3-6,9,20-22h,7-8,10-14h2,1-2h3key: vzpxhgjteapnaa-uhfffaoyaq smiles cn(c)cc1ccc(o1)csccn/c(=c\(=o))ncc2cc3ococ3cc2 properties chemical formula c20h26n4o5s molar mass 434.51 g·mol−1 pharmacology atc code a02ba05 (who) except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references