All four stereoisomers of flavolipin were synthesized from d-glucose in a stereocontrolled manner. None of them was identical with the reported natural product.
The proposed structure of natural flavolipin was revised as N-[N-[(3R)-15-methyl-3-(13-methyltetradecanoyloxy)hexadecanoyl]glycyl]-L-serine as a result of synthetic study and biological activity test.