α-Acetyl-γ-(β-indolyl)methyltetramic acid. A biosynthetic intermediate of cyclopiazonic acid and of bis-secodehydrocyclopiazonic acid
Abstract
It has been shown that tryptophan is not utilized in a cell-free system of Penicillium cyclopium; α-acetyl-γ-(β-indolyl)methyltetramic acid, a biosynthetic intermediate of the cyclopiazonic acids, has been identified, and the L-configuration at the asymmetric centre of the new indole established.