tetrahydroharman tetrahydroharman tetrahydroharman(e), also known as 1-methyl-1,2,3,4-tetrahydro-β-carboline, is a general name for one of two isomers: (1s)-1-methyl-2,3,4,9-tetrahydro-1h-pyridoindole calligonine ((1r)-1-methyl-2,3,4,9-tetrahydro-1h-pyridoindole) tetrahydroharman names preferred iupac name 1-methyl-2,3,4,9-tetrahydro-1h-pyridoindole systematic iupac name 1-methyl-1h,2h,3h,4h,9h-pyridoindole other names elaeagninemethtryptolinetetrahydroharmane identifiers cas number 525-40-6 n23844-21-5 (1s) y2254-36-6 (1r) y2506-10-7 n 3d model (jsmol) interactive image 3dmet b02744 chebi chebi:311872 n chemspider 82643 n614612 (1s) y390581 (1r) y ec number 219-711-4 kegg c09089 n mesh tetrahydroharmane pubchem cid 91522 ()704991 (1s)442025 (1r) comptox dashboard (epa) dtxsid20966937 inchi inchi=1s/c15h13no3/c1-19-12-8-6-11(7-9-12)10-16-14-5-3-2-4-13(14)15(17)18/h2-10h,1h3,(h,17,18)/b16-10+ ykey: szidprxjwmiijf-mhwrwjlksa-n yinchi=1s/c12h14n2/c1-8-12-10(6-7-13-8)9-4-2-3-5-11(9)14-12/h2-5,8,13-14h,6-7h2,1h3key: lpijozbivdcqte-uhfffaoysa-n smiles cc1nccc2=c1nc1=cc=cc=c21 properties chemical formula c12h14n2 molar mass 186.25296 g/mol except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references calligonine is a major alkaloid constituent of the roots of calligonum minimum and the bark of elaeagnus angustifolia. when taken internally, it has the effect of substantially lowering blood pressure for an extended period of time, similar to reserpine.