Ochratoxin B methyl ester

N-[[(R)-3,4-Dihydro-8-hydroxy-3-methyl-1-oxo-1H-2-benzopyran-7-yl]carbonyl]-L-phenylalanine methyl ester

N-[[(R)-1-Oxo-3-methyl-8-hydroxy-3,4-dihydro-1H-2-benzopyran-7-yl]carbonyl]-L-phenylalanine methyl ester