sch 900271 sch 900271 sch 900271 is a nicotinic acid derivative designed to treat dyslipidemia. it reduced plasma free fatty acids levels, but without significant flushing, a side effect common with niacin that limits its usefulness. sch 900271 is currently in human trials. sch 900271 names preferred iupac name 5--2h-pyranopyrimidine-2,4,7(1h,3h)-trione identifiers cas number 915210-50-3 y 3d model (jsmol) interactive image chembl chembl2036958 chemspider 28518389 drugbank db12433 pubchem cid 56950369 unii g2283xq6vj y comptox dashboard (epa) dtxsid00238609 inchi inchi=1s/c14h16n2o4/c1-14(5-6-14)4-2-3-8-7-9(17)20-12-10(8)11(18)15-13(19)16-12/h7h,2-6h2,1h3,(h2,15,16,18,19)key: arjkmwxlihzlqz-uhfffaoysa-ninchi=1/c14h16n2o4/c1-14(5-6-14)4-2-3-8-7-9(17)20-12-10(8)11(18)15-13(19)16-12/h7h,2-6h2,1h3,(h2,15,16,18,19)key: arjkmwxlihzlqz-uhfffaoyap smiles o=c1c=c(cccc2(cc2)c)c(c(nc(n3)=o)=o)=c3o1 properties chemical formula c14h16n2o4 molar mass 276.292 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references