Term Name: alkaloid
Synonyms: alcaloide, alcaloides, Alkaloid, Alkaloide, alkaloids
Definition: Any of the naturally occurring, basic nitrogen compounds (mostly heterocyclic) occurring mostly in the plant kingdom, but also found in bacteria, fungi, and animals. By extension, certain neutral compounds biogenetically related to basic alkaloids are also classed as alkaloids. Amino acids, peptides, proteins, nucleotides, nucleic acids, amino sugars and antibiotics are not normally regarded as alkaloids. Compounds in which the nitrogen is exocyclic (dopamine, mescaline, serotonin, etc.) are usually classed as amines rather than alkaloids.
Ontology: Chebi [CHEBI:22315]

Relationships
is a type of: organonitrogen compound
has subtype: (+)-aplysinillin (+/-)-gamma-Lycorane (-)-Alstolucine A, (rel)- (-)-Alstolucine B, (rel)- (-)-Alstolucine C (-)-Alstolucine D, (rel)- (-)-Alstolucine E (-)-Alstolucine F (-)-antofine (-)-Apparicine (-)-demecolcine (-)-dibromophakellin (-)-Ormosanine (-)-Quebrachamine (1S,15S,18S,19S,20S)-N-[2-(4-aminophenyl)ethyl]-18-hydroxy-1,3,11,12,14,15,16,17,18,19,20,21-dodecahydroyohimban-19-carboxamide (2'S)-Hydroxy-(11S,12R)-dihydrostemofoline, (rel)- (2'S)-Hydroxystemofoline (2R,3S,11bR)-2-[[(1S)-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinolin-1-yl]methyl]-3-ethyl-9,10-dimethoxy-2,3,4,6,7,11b-hexahydro-1H-benzo[a]quinolizine (2S,3R)-2-[(6,7-dimethoxy-1,2,3,4-tetrahydroisoquinolin-1-yl)methyl]-3-ethyl-9,10-dimethoxy-2,3,4,6,7,11b-hexahydro-1H-benzo[a]quinolizine (2S,3R)-2-[[(1R)-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinolin-1-yl]methyl]-3-ethyl-9,10-dimethoxy-2,3,4,6,7,11b-hexahydro-1H-benzo[a]quinolizine (4aR,5aS,8aR,15bR)-10,11-dimethoxy-4a,5,5a,7,8,13a,15,15a,15b,16-decahydro-2H-4,6-methanoindolo[3,2,1-ij]oxepino[2,3,4-de]pyrrolo[2,3-h]quinoline-14-one (4aR,8aR,15bR)-4a,5,5a,7,8,13a,15,15a,15b,16-decahydro-2H-4,6-methanoindolo[3,2,1-ij]oxepino[2,3,4-de]pyrrolo[2,3-h]quinoline-14-one (7S)-7-acetamido-1,2,3-trimethoxy-6,7-dihydro-5H-dibenzo[5,3-b:1',2'-e][7]annulene-9-carboxylic acid (7S,14S)-(-)-7-Methyl-10-O-demethylxylopinine (R,S)-Scoulerine (S)-1-hydroxy-N-methylcanadine (S)-colchicine 1',2'-didehydrostemofoline 1,2-O-Diacetylzephyranthine 1-hydroxyprotostemonine, (rel)- 1-O-Acetyllycorine 2'-hydroxystemofoline 2,3,9,10-Tetrahydroxyberberine 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline 2-Bromo-5-hydroxy-N-[2-(4-hydroxyphenyl)ethyl]-4-methoxy-N-methylbenzamide 2-phenylethylamine 2alpha-(2'-pyrrolyl)-4alpha-methoxycarbonyl-5beta-[(2''-methyl)-heptyl]-1,3-oxazacyclohexane 3,4-dimethoxyphenylethylamine 3,9-dimethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline-2,10-diol 3-(4-methoxyphenyl)-3-[[2-(4-methoxyphenyl)-1-oxoethyl]amino]propanoic acid 3-(6-chloro-3-pyridinyl)-7-azabicyclo[2.2.1]heptane 3-Acetylnerbowdine 3-Epimacronine 3-O-Acetylhamayne 5-bromo-8-methoxy-1-methyl-beta-carboline 6-hydroxymanzamine A 7-epi-cylindrospermopsin 8-hydroxymanzamine A 9-O-Demethyl-2alpha-hydroxyhomolycorine 9-O-Demethylhomolycorine 11-Hydroxyvittatine 11-Methoxysampangine 14-norpseurotin A 15-hydroxyangustilobine A 16-epivincamine 16R,19E-isositsirikine 19,20-E-vallesamine 19-Hydroxytabersonine 20(R)-tubotaiwine 20(S)-tubotaiwine acetylcaranine acronycine Acutumidine Acutumine Affinine ageladine A Akuammine alamarine Albomaculine alkaloid antibiotic alkaloid ester Aloperine Alpinine Amalorin Ambelline Ammothamnine Anagyrine angustilobine B, (rac)- annomontine Apovincamine Argentine ascidiathiazone A ascidiathiazone B aspernidine A aspernigrin A asperparaline A Aspidospermatine Baloxine Baptifoline batzelladine A batzelladine B benzazepine alkaloid benzodiazepine alkaloid Berberastine betalain biindole alkaloid bisindole alkaloid Bonafousine brovincamine Brovincamine fumarate C-Curarine Calebassone Candimine Capaurine Caracurine V carbazole alkaloid Caribine carpaine Caseadine Catharine caulophine Caulophylline Cavinine ceratamine A ceratamine B cheilanthifoline circumdatin H colchicine Colchicoside coptisine Corynantheidine crambescidin 401 crambescidin 800 crambescidin 826 Crinamidine Crinamine Crinine croomine cryptopleurine Cularicine Cularidine Cularimine Cularine cylindrospermopsin cystodytin D cystodytin E cystodytin F cystodytin G cytisine cytochalasan alkaloid cytochalasin D Deacetylcolchicine decahydroquinoline alkaloid decarbamoylsaxitoxin Dehydrocorydaline Dehydrocorydalmine Dehydrocorytenchine Demissidine deoxycylindrospermopsin Didehydrostemofoline Dihydrocorynantheine Dimethamine Dubiusine Eburnamine Eburnamonine Elymoclavine ent-6alpha-Hydroxybuphanisine ent-6beta-Hydroxybuphanisine epibatidine ergoline alkaloid Erysonine Erysotrine Erythratidine feruloylagmatine ficellomycin Floramultine Gabunamine Germine Glaziovine Haemanthamine Haemanthidine Hamayne harmala alkaloid Harringtonine hederacine A hederacine B herquline B Hirsuteine Homoormosanine Imperialine indirubin-3'-monoxime indole alkaloid indolizidine alkaloid Isococculidine Isomatrine isoquinoline alkaloid Jamine Jatrorrhizine karakoline Kreysigine L-proline betaine lamellarin alpha 20-hydrogen sulfate leuconoxine LSM-1309 LSM-1372 LSM-1597 LSM-1944 LSM-4236 LSM-4502 LSM-5249 LSM-6354 LSM-6387 LSM-6464 LSM-6667 LSM-16753 LSM-18556 LSM-22634 LSM-24185 lycojapodine A lycoperine A Lycorenine lymphostin manzamine A massadine Matrine Mecambrine monoamine alkaloid muscimol N(4)-demethyl-12-methoxyalstogustine N-[2-(3,4-diethoxyphenyl)ethyl]-4-phenoxybenzamide N-Formyldemecolcine N-methyl-1-deoxynojirimycin N-methylcheilanthifoline N-methylnicotinate N-methylphenylethanolamine neosaxitoxin neotuberostemonine nigerazine A nigerazine B nigragillin nitensidine E Nobilisitine A nostocarboline O-Methyllycorenine oriciacridone C oriciacridone F oxyprotostemonine Panamine paralytic shellfish toxin penipanoid B Phellodendrine phenanthrene alkaloid phenethylamine alkaloid phyllospadine pipercallosidine pipercallosine piperidine alkaloid piperlactam S Piptanthine Pretazettine protostemonine Protoveratrine A Protoveratrine B Protoverine Pseudocolumbamine Pseudopalmatine pseudopelletierine purine alkaloid pyridine alkaloid pyrrolidine alkaloid pyrrolizidine alkaloid pyrrolizine alkaloid pyrrolnitrin quinazoline alkaloid quinoline alkaloid quinolizidine alkaloid Rhoeadine Rhombifoline rohitukine Roxburghine B ryanodine Sampangine saxitoxin Scholaricine Sinactine solanidine Sophoranol spermidine alkaloid spirosolane stemofoline steroid alkaloid syncarpamide Tabernamine Tabernanthine Templetine terpene alkaloid tetrahydrocolumbamine tetramethylpyrazine thalictricavine Thermospine Tinctorine Toxiferine I tropane alkaloid tuberostemonine tuberostemonine N veracevine Verticine vinervine Vinpocetine Worenine xestospongin C Xylopinine zarzissine Zephyranthine Zhebeinine Zygadenine
has_role: metabolite