Pyrrolizidine alkaloids. Biosynthesis of monocrotalic acid, the necic acid component of monocrotaline
Abstract
[U-14C]-L-Threonine and [U-14C]-L-isoleucine were specifically incorporated into monocrotalic acid (III) the necic acid component of the pyrrolizidine alkaloid monocrotaline (I) in Crotalaria spectabilis and Crotalaria retusa.