11c-ucb-j 11c-ucb-j 11c-ucb-j is a pet tracer for imaging the synaptic vesicle glycoprotein 2a in the human brain. 11c-ucb-j names preferred iupac name (4r)-1--4-(3,4,5-trifluorophenyl)pyrrolidin-2-one other names ucb-j; 11c-ucb-j; ucb-j identifiers cas number 2098041-11-1 y 3d model (jsmol) interactive image pubchem cid 74539761 unii 99pjr3ql3y y inchi inchi=1s/c17h15f3n2o/c1-10-7-21-3-2-11(10)8-22-9-13(6-16(22)23)12-4-14(18)17(20)15(19)5-12/h2-5,7,13h,6,8-9h2,1h3/t13-/m0/s1/i1-1key: rfsdyrvogwhoft-xotojzthsa-n smiles c1=cn=cc=c1cn1c(cc1=o)c1=cc(f)=c(f)c(f)=c1 properties chemical formula c17h15f3n2o molar mass 320.315 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references it is used to study the brain changes associated with several diseases including alzheimer's disease, schizophrenia, and depression.