InChI=1S/C21H26O6/c22-18-11-14-10-17-13(5-4-7-19(17)27-12-21(25)26)9-16(14)15(18)6-2-1-3-8-20(23)24/h1,3-5,7,14-16,18,22H,2,6,8-12H2,(H,23,24)(H,25,26)/b3-1+/t14-,15+,16-,18+/m0/s1