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