(2R,3R)-5,7-dihydroxy-4-oxo-2-phenyl-3,4-dihydro-2H-chromen-3-yl rel-(2S)-2-methylbutanoate 2-Methyl-butyric acid 5,7-dihydroxy-4-oxo-2-phenyl-chroman-3-yl ester 3-O-[(S)-2-methylbutyroyl]pinobanksin InChI=1/C20H20O6/c1-3-11(2)20(24)26-19-17(23)16-14(22)9-13(21)10-15(16)25-18(19)12-7-5-4-6-8-12/h4-11,18-19,21-22H,3H2,1-2H3/t11-,18+,19-/m0/s butanoic acid, 2-methyl-, (2R,3R)-3,4-dihydro-5,7-dihydroxy-4-oxo-2-phenyl-2H-1-benzopyran-3-yl ester, (2S)-