Fig. 1From: Expanding metabolic pathway for de novo biosynthesis of the chiral pharmaceutical intermediate l-pipecolic acid in Escherichia coli The structures of pipecolate derivatives. The chemical structures of pipecolate derivatives including (1) rapamycin, (2) FK-506, (3) meridamycin, (4) ropivacaine, (5) nocardiopsin. The pipecolate groups are represented in red Back to article page