InChI=1/C21H20O7/c1-20(2)16(22)11-17(23)21(3,28-20)7-9-26-19-12-4-5-18(24)27-15(12)10-14-13(19)6-8-25-14/h4-6,8,10-11,22H,7,9H2,1-3H O-[2-(5-hydroxy-2,6,6-trimethyl-3-oxo-2H-pyran-2-yl)ethyl]bergaptol