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N -Methylheliamine
Names
IUPAC name
6,7-dimethoxy-2-methyl-3,4-dihydro-1H -isoquinoline
Other names
6,7-Dimethoxy-2-methyl-1,2,3,4-tetrahydroisoquinoline; 6,7-Dimethoxy-2-methyl-THIQ; O -Methylcorypalline; Oxymethylcorypalline
Identifiers
ChEBI
ChEMBL
ChemSpider
EC Number
UNII
InChI=1S/C12H17NO2/c1-13-5-4-9-6-11(14-2)12(15-3)7-10(9)8-13/h6-7H,4-5,8H2,1-3H3
Key: TXPPKWZEHFNZOE-UHFFFAOYSA-N
cation: InChI=1S/C12H17NO2/c1-13-5-4-9-6-11(14-2)12(15-3)7-10(9)8-13/h6-7H,4-5,8H2,1-3H3/p+1
Key: TXPPKWZEHFNZOE-UHFFFAOYSA-O
CN1CCC2=CC(=C(C=C2C1)OC)OC
cation: C1C=2C(=CC(OC)=C(C2)OC)CC[NH+]1C
Properties
C 12 H 17 N O 2
Molar mass
−1
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
Chemical compound
N -MethylheliamineO -methylcorypalline6,7-dimethoxy-2-methyl-1,2,3,4-tetrahydroisoquinoline , is a tetrahydroisoquinoline and cyclized phenethylamine alkaloid found in Pachycereus pringlei cacti .[ 1] [ 2] [ 3] monoamine oxidase inhibitor (MAOI), specifically of monoamine oxidase B (MAO-B) (Ki = 29 μM).[ 2] [ 4]
^ Lundström, Jan (1983). "Chapter 6 Simple Isoquinoline Alkaloids". The Alkaloids: Chemistry and Pharmacology . Vol. 21. Elsevier. pp. 255– 327. doi :10.1016/s0099-9598(08)60052-8 . ISBN 978-0-12-469521-4 TABLE 1: SIMPLE ISOQUINOLINE ALKALOIDS [...] TABLE II SIMPLE ISOQUINOLINE ALKALOIDS IN THE FAMILY OF CACTACEAE [...] [...] Pachycereus pringlei (S. Wats) Br&R: Heliamine (10), Lemaireocereine (7), Tehaunine (34), Weberine (40), Tehaunine N-oxide (34a). In Pachycereus pringlei, heliamine (10), tehaunine (34), lemaireocereine (7), and weberine (40) were identified (59). ^ a b Keeper Trout & friends (2013). Trout's Notes on The Cactus Alkaloids Nomenclature, Physical properties, Pharmacology & Occurrences (Sacred Cacti Fourth Edition, Part C: Cactus Chemistry: Section 1) (PDF) . Mydriatic Productions/Better Days Publishing.^ Menachery, Mary D.; Lavanier, Gregory L.; Wetherly, Mark L.; Guinaudeau, Hélène; Shamma, Maurice (1986). "Simple Isoquinoline Alkaloids" Journal of Natural Products . 49 (5): 745– 778. Bibcode :1986JNAtP..49..745M . doi :10.1021/np50047a001 . ISSN 0163-3864 . Retrieved 20 May 2025 . ^ Bembenek ME, Abell CW, Chrisey LA, Rozwadowska MD, Gessner W, Brossi A (January 1990). "Inhibition of monoamine oxidases A and B by simple isoquinoline alkaloids: racemic and optically active 1,2,3,4-tetrahydro-, 3,4-dihydro-, and fully aromatic isoquinolines". J Med Chem . 33 (1): 147– 152. doi :10.1021/jm00163a025 . PMID 2296014 .
Phenethylamines Amphetamines Phentermines Cathinones Phenylisobutylamines (and further-extended) Catecholamines (and close relatives) Cyclized
Phenylalkylpyrrolidines 2-Benzylpiperidines (phenidates ) Phenylmorpholines (phenmetrazines) Phenyloxazolamines (aminorexes) Isoquinolines andtetrahydroisoquinolines 2-Aminoindanes 2-Aminotetralins Others / unsorted
1-Aminomethylindanes (e.g., 2CB-Ind , AMMI , bromojimscaline , jimscaline )2-ADN 2-Benzhydrylpyrrolidine 2C-B-5-hemiFLY-α6 (BNAP) 2C-B-PYR 2CBecca 2CJP 2CLisaB 2CLisaH 3-Benzhydrylmorpholine 3-Phenylpiperidines (e.g., 3-phenylpiperidine , 3-PPP , OSU-6162 (PNU-96391) , LPH-5 , LPH-48 , Z3517967757 (Z7757) )6-AB AL-1095 Aminochromes (e.g., adrenochrome , adrenolutin )Benzazepines (e.g., fenoldopam , lorcaserin , SCHEMBL5334361 )Benzocyclobutenes (e.g., 2CBCB-NBOMe , bromotomscaline , S33005 , TCB-2 , tomscaline )Benzoxepins (e.g., BBOX , IBOX , TFMBOX )Butyltolylquinuclidine Camfetamine Cypenamine (trans -2-phenylcyclopentylamine) Diphenidine Diphenylprolinol DMBMPP Ergolines (e.g., LSD )Fencamfamin GYKI-52895 HDMP-29 Ivabradine Methoxphenidine Methylmorphenate Milnacipran MT-45 2-Naphthylamine Org 6582 Partial ergolines (e.g., NDTDI , RU-27849 , DEIMDHPCA , DEMPDHPCA , DEMPDHPCA-2C-D , RU-27251 )PF-592,379 Phenylcyclopropylamines (e.g., DMCPA , TMT , tranylcypromine )Phenylpiracetams (e.g., phenylpiracetam , MRZ-9547 , RGPU-95 )Pyridopyrroloquinoxalines (e.g., lumateperone , deulumateperone , IHCH-7079 , IHCH-7086 , IHCH-7113 , ITI-1549 )Tetrahydrobenzopyranylamines (e.g., CT-5126 )Tolazoline Tricyclics (e.g., AMDA , AMDH , benzoctamine , dizocilpine , SpAMDA )ZC-B
Related compounds
2-Furylethylamine 2-Pyrrolylethylamine 3-Pyrrolylethylamine 3-Pyrrolylpropylamine 2-Tetrahydrofurylethylamine 4-Benzylpiperidine 7-AB Alkylamines (e.g., 1,3-DMBA Tooltip 1,3-dimethylbutylamine , 1,4-DMAA Tooltip 1,4-dimethylamylamine , heptaminol , iproheptine , isometheptene , methylhexanamine/1,3-DMAA , octodrine , oenethyl , tuaminoheptane )Benzylamines (e.g., benzylamine , α-methylbenzylamine , MDM1EA , ALPHA , M-ALPHA , pargyline )Benzylpiperazines (e.g., benzylpiperazine , MDBZP , fipexide )Cyclohexylaminopropanes (e.g., propylhexedrine , norpropylhexedrine )Cyclopentylaminopropanes (e.g., isocyclamine , cyclopentamine )Phenoxyethylamines (e.g., 3,4,5-trimethoxyphenoxyethylamine , CT-4719 , ORG-37684 )Phenylalkenylamines (e.g., phenylbutenamine )Phenylalkynylamines (e.g., phenylbutynamine )Phenylpiperazines (e.g., 1-phenylpiperazine , mCPP Tooltip meta-chlorophenylpiperazine , TFMPP Tooltip trifluoromethylphenylpiperazine , oMPP Tooltip ortho-methylphenylpiperazine , pFPP Tooltip para-fluorophenylpiperazine , pMeOPP Tooltip para-methoxyphenylpiperazine )Phenylpropylamines (e.g., phenylpropylamine , homo-MDA , homo-MDMA )Thienylaminopropanes (thiopropamines) (e.g., thiopropamine , methiopropamine , thiothinone )
