(9R-cis)-9-(Acetyloxy)-9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo(1,2-b:3,4-b')dipyran-10-yl 3-methylbutanoate 3'-O-Acetyl-4'-O-isovaleryl-cis-khellactone 53023-17-9 Butanoic acid, 3-methyl-, 9-(acetyloxy)-9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo(1,2-b:3,4-b')dipyran-10-yl ester, (9R-cis)- Saxdorphin Suksdorfin