metocurine metocurine metocurine is a muscle relaxant through neuromuscular blockade. it is excreted entirely through the kidneys and therefore should not be used in patients with kidney failure. metocurineidentifiers iupac name (1β)-6,6',7',12'-tetramethoxy-2,2,2',2'-tetramethyltubocuraran-2,2'-diium cas number5152-30-7pubchem cid21233drugbankdb01336chemspider19961uniiv0m92g2u26chemblchembl1259 ycomptox dashboard (epa)dtxsid0048262 chemical and physical dataformulac40h48n2o6molar mass652.832 g·mol−13d model (jsmol)interactive image smiles c1(ccc2=cc(=c3c=c21cc4=cc=c(c=c4)oc5=c6(cc7=cc(=c(c=c7)oc)o3)(ccc6=cc(=c5oc)oc)(c)c)oc)c