Cyclopiazonic acid

Cyclopiazonic acid

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Names
IUPAC name (6aR,11aS,11bR)-10-Acetyl-11-hydroxy-7,7-dimethyl-2,6,6a,7,11a,11b-hexahydro-9H-pyrrolo[1',2':2,3]isoindolo[4,5,6-cd]indol-9-one
Identifiers
CAS Number	18172-33-3 N
ChEBI	CHEBI:22450 Y
ChEMBL	ChEMBL480627 Y
ChemSpider	21106432 Y
IUPHAR/BPS	5350
Jmol 3D model	Interactive image
PubChem	65261
InChI InChI=1S/C20H20N2O3/c1-9(23)14-18(24)17-16-11-8-21-13-6-4-5-10(15(11)13)7-12(16)20(2,3)22(17)19(14)25/h4-6,8,12,16-17,21,24H,7H2,1-3H3/t12-,16+,17+/m1/s1 Y Key: SZINUGQCTHLQAZ-DQYPLSBCSA-N Y InChI=1/C20H20N2O3/c1-9(23)14-18(24)17-16-11-8-21-13-6-4-5-10(15(11)13)7-12(16)20(2,3)22(17)19(14)25/h4-6,8,12,16-17,21,24H,7H2,1-3H3/t12-,16+,17+/m1/s1 Key: SZINUGQCTHLQAZ-DQYPLSBCBO
SMILES CC(=O)/C1=C(\O)[C@H]5N(C1=O)[C@@](C)(C)[C@@H]4Cc2cccc3ncc(c23)[C@@H]45
Properties
Chemical formula	C20H20N2O3
Molar mass	336.39 g·mol−1
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Cyclopiazonic acid (CPA) is a toxic fungal secondary metabolite. Chemically, CPA is related to ergoline alkaloids. CPA was originally isolated from Penicillium cyclopium and subsequently from other fungi including Penicillium griseofulvum, Penicillium camemberti, Penicillium commune, Aspergillus flavus, and Aspergillus versicolor. CPA only appears to be toxic in high concentrations. Biologically, CPA is a specific inhibitor of SERCA ATPase in intracellular Ca²⁺ storage sites.