Fig. 8

Tracing the flow of 13C carbon from [1-13C] /[1,6-13C] Glc through primary metabolic pathway for the formation of functional groups present in limonoids. (a) tiglate group present in azadirachtin and salannin is traced through isoleucine biosynthetic pathways. (b) isovalerate group present in salannolacetate is traced through leucine biosynthetic pathway