InChI=1S/C21H22O5/c1-12(2)6-7-24-14-9-18(23-3)20-19(10-14)25-11-16-15-5-4-13(22)8-17(15)26-21(16)20/h4-6,8-10,16,21-22H,7,11H2,1-3H3/t16-,21+/m0/s1