(Science: chemical) 4-hydroxy-4h-furo(3,2-c)pyran-2(6h)-one. A mycotoxin produced by several species of aspergillus and penicillium. It is found in unfermented apple and grape juice and field crops. It has antibiotic properties and has been shown to be carcinogenic and mutagenic and causes chromosome damage in biological systems.
Chemical name: 4H-Furo(3,2-c)pyran-2(6H)-one, 4-hydroxy-