Conopharyngine

Conopharyngine
Names
	IUPAC name Methyl (1S,15S,17S,18S)-17-ethyl-6,7-dimethoxy-3,13-diazapentacyclo[13.3.1.02,10.04,9.013,18]nonadeca-2(10),4,6,8-tetraene-1-carboxylate
Identifiers
CAS Number	76-98-2;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:141888;
ChEMBL	ChEMBL523582;
ChemSpider	19969553;
PubChem CID	453209;
	InChI InChI=1S/C23H30N2O4/c1-5-14-8-13-11-23(22(26)29-4)20-15(6-7-25(12-13)21(14)23)16-9-18(27-2)19(28-3)10-17(16)24-20/h9-10,13-14,21,24H,5-8,11-12H2,1-4H3/t13-,14-,21-,23+/m0/s1 Key: DUFLXLVGASPEMV-BPYGGHBPSA-N;
	SMILES CCC1CC2CC3(C1N(C2)CCC4=C3NC5=CC(=C(C=C45)OC)OC)C(=O)OC;
Properties
Chemical formula	C23H30N2O4
Molar mass	398.503 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Conopharyngine is the major alkaloid present in the leaves and stem-bark of Tabernaemontana pachysiphon and Conopharyngia durissima.^[1]^[2]^[3] It is closely related voacangine and coronaridine. Conopharyngine pseudoindoxyl, a derivative of it, is also found in the same plant Tabernaemontana pachysiphon.^[4]

Pharmacology

It possess central nervous system stimulant activity and produces bradycardia and hypotension in cats. It has weak acetylcholinesterase inhibitory activity and significantly increases hexobarbitone induced sleeping time.^[5]

It has low intravenous toxicity in mice (LD₅₀ = 143 mg/kg).^[5]

^ "Tabernaemontana pachysiphon".
^ van Beek TA, de Smidt C, Verpoorte R (1985). "Phytochemical investigation of Tabernaemontana crassa". Journal of Ethnopharmacology. 14 (2–3): 315–8. doi:10.1016/0378-8741(85)90096-0. PMID 4094474.
^ Renner, U.; Prins, D. A.; Stoll, W. G. (1959). "Alkaloide ausConopharyngia durissima STAPF Isovoacangin, Conopharyngin, Conodurin und Conoduramin". Helvetica Chimica Acta. 42 (5): 1572–1581. doi:10.1002/hlca.19590420519. ISSN 0018-019X.
^ Crooks PA, Robinson B (October 1973). "Conopharyngine pseudoindoxyl, a new alkaloid from Tabernamontana pachysiphon Stapf. var cumminsii (Stapf.) H. Huber". The Journal of Pharmacy and Pharmacology. 25 (10): 820–3. doi:10.1111/j.2042-7158.1973.tb09948.x. PMID 4149744. S2CID 9261649.
^ ^a ^b Carroll PR, Starmer GA (May 1967). "Studies on the pharmacology of conopharyngine, an indole alkaloid of the voacanga series". British Journal of Pharmacology and Chemotherapy. 30 (1): 173–85. doi:10.1111/j.1476-5381.1967.tb02123.x. PMC 1557242. PMID 6039971.