tetrahydropapaveroline tetrahydropapaveroline tetrahydropapaveroline (norlaudanosoline) is a benzyltetrahydroisoquinoline alkaloid. tetrahydropapaveroline names iupac name 1--1,2,3,4-tetrahydroisoquinoline-6,7-diol other names norlaudanosoline; tetrahydroxypapaveroline identifiers cas number 4747-99-3 y 3d model (jsmol) interactive image echa infocard 100.158.898 pubchem cid 18519 unii v1ewj6b8ky y comptox dashboard (epa) dtxsid70963850 inchi inchi=1s/c16h17no4/c18-13-2-1-9(6-14(13)19)5-12-11-8-16(21)15(20)7-10(11)3-4-17-12/h1-2,6-8,12,17-21h,3-5h2key: abxzoxdthttzjw-uhfffaoysa-n smiles c1cnc(c2=cc(=c(c=c21)o)o)cc3=cc(=c(c=c3)o)o properties chemical formula c16h17no4 molar mass 287.315 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references it can be formed in trace amounts in the brain by a condensation reaction of dopamine and dopaldehyde (a metabolite of dopamine). it inhibits dopamine uptake within the cerebral cortex.