cilazapril cilazapril cilazapril is an angiotensin-converting enzyme inhibitor (ace inhibitor) used for the treatment of hypertension and congestive heart failure. cilazapril names preferred iupac name (1s,9s)-9--10-oxooctahydro-6h-pyridazinodiazepine-1-carboxylic acid identifiers cas number 88768-40-5 n 3d model (jsmol) interactive image chebi chebi:3698 chembl chembl515606 n chemspider 50831 n drugbank db01340 y echa infocard 100.168.764 iuphar/bps 6459 kegg d07699 y pubchem cid 5633040467985 (1r,9s)-(2s)-butylamino isomer unii 8q9454114q n comptox dashboard (epa) dtxsid1048629 inchi inchi=1s/c22h31n3o5/c1-2-30-22(29)18(13-12-16-8-4-3-5-9-16)23-17-10-6-14-24-15-7-11-19(21(27)28)25(24)20(17)26/h3-5,8-9,17-19,23h,2,6-7,10-15h2,1h3,(h,27,28) nkey: hhhkfgxwkkuncy-uhfffaoysa-n n smiles ccoc(=o)c(ccc1ccccc1)nc1cccn2cccc(n2c1=o)c(o)=o properties chemical formula c22h31n3o5 molar mass 417.506 g·mol−1 log p 2.212 acidity (pka) 2.285 basicity (pkb) 11.712 pharmacology atc code c09aa08 (who) routes ofadministration oral legal status uk: pom (prescription only) 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 it was patented in 1982 and approved for medical use in 1990. chemistry of the eight possible stereoisomers, only the all-(s)-form is medically viable. brand names it is branded as dynorm, inhibace, vascace and many other names in various countries. none of these are available in the united states as of may 2010.