InChI=1S/C23H28O3/c1-19(12-8-14-21(3)16-17-23(25)26-5)10-6-7-11-20(2)13-9-15-22(4)18-24/h6-18H,1-5H3/b7-6+,12-8+,13-9+,17-16+,19-10+,20-11+,21-14-,22-15+