mepixanox mepixanox mepixanox (pimexone) is a respiratory stimulant. mepixanoxclinical dataatc coder07ab09 (who) identifiers iupac name 3-methoxy-4-(piperidin-1-ylmethyl)-9h-xanthen-9-one cas number17854-59-0 ypubchem cid65687chemspider59116 nunii7419t4yqqwkeggd07410 ychemblchembl2104462 ncomptox dashboard (epa)dtxsid90170504 echa infocard100.037.994 chemical and physical dataformulac20h21no3molar mass323.392 g·mol−13d model (jsmol)interactive image smiles coc1=c(c2=c(c=c1)c(=o)c3=cc=cc=c3o2)cn4ccccc4 inchi inchi=1s/c20h21no3/c1-23-17-10-9-15-19(22)14-7-3-4-8-18(14)24-20(15)16(17)13-21-11-5-2-6-12-21/h3-4,7-10h,2,5-6,11-13h2,1h3 nkey:pysohoouxfwcff-uhfffaoysa-n n ny (what is this?) (verify)