cipemastat cipemastat cipemastat (rinn, also known as ro 32-3555 and by the tentative trade name trocade) is a selective inhibitor of matrix metalloproteinase-1 that has been investigated as an anti-arthritis agent. it is being developed by roche. cipemastat names preferred iupac name (2r,3r)-3-(cyclopentylmethyl)-n-hydroxy-4-oxo-4-(piperidin-1-yl)-2-butanamide identifiers cas number 190648-49-8 n 3d model (jsmol) interactive image chembl chembl115653 y chemspider 8000097 y iuphar/bps 6466 pubchem cid 9824350 unii 02hq4tyq60 y comptox dashboard (epa) dtxsid10897569 inchi inchi=1s/c22h36n4o5/c1-22(2)20(29)26(21(30)24(22)3)14-17(18(27)23-31)16(13-15-9-5-6-10-15)19(28)25-11-7-4-8-12-25/h15-17,31h,4-14h2,1-3h3,(h,23,27)/t16-,17+/m1/s1 ykey: gfuitadoepnrml-sjorkvtesa-n y smiles cc1(c)nc(=o)n(c((cc2cccc2)c(=o)n3ccccc3)c(=o)no)c1=o properties chemical formula c22h36n4o5 molar mass 436.553 g·mol−1 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