InChI=1S/C23H28O3/c1-7-17(2)14-19(4)15-18(3)12-10-8-9-11-13-21-20(5)22(25-6)16-23(24)26-21/h7-16H,1-6H3/b9-8+,12-10+,13-11+,17-7+,18-15+,19-14+