InChI=1S/C17H22O4/c1-10-9-17-6-3-13(18)16(2,5-4-15(20)21)12(17)7-11(10)8-14(17)19/h3,6,11-12,14,19H,1,4-5,7-9H2,2H3,(H,20,21)/t11-,12-,14-,16+,17+/m1/s1