coclaurine coclaurine coclaurine is a nicotinic acetylcholine receptor antagonist which has been isolated from a variety of plant sources including nelumbo nucifera, sarcopetalum harveyanum, ocotea duckei, and others. it belongs to the class of tetrahydroisoquinoline alkaloids. dimerization of coclaurine leads to the biscoclaurine alkaloids such as cepharanthine. coclaurine names preferred iupac name (1s)-1--6-methoxy-1,2,3,4-tetrahydroisoquinolin-7-ol identifiers cas number 486-39-5 y 3d model (jsmol) interactive image chemspider 141028 kegg c06161 y pubchem cid 160487 unii cw1576313y y comptox dashboard (epa) dtxsid60197561 inchi inchi=1s/c17h19no3/c1-21-17-9-12-6-7-18-15(14(12)10-16(17)20)8-11-2-4-13(19)5-3-11/h2-5,9-10,15,18-20h,6-8h2,1h3/t15-/m0/s1key: lvvkxrqzsruvpy-hnnxbmfysa-ninchi=1/c17h19no3/c1-21-17-9-12-6-7-18-15(14(12)10-16(17)20)8-11-2-4-13(19)5-3-11/h2-5,9-10,15,18-20h,6-8h2,1h3/t15-/m0/s1key: lvvkxrqzsruvpy-hnnxbmfybj smiles coc1=c(c=c2(nccc2=c1)cc3=cc=c(c=c3)o)o properties chemical formula c17h19no3 molar mass 285.343 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references