InChI=1S/C21H22O3/c1-18-17-19(15-16-20(18)22)13-11-9-7-5-3-4-6-8-10-12-14-21(23)24-2/h3-17,22H,1-2H3/b5-3+,6-4+,9-7+,10-8+,13-11+,14-12+