InChI=1S/C15H18O5/c1-7-6-9(17)12-13(18)11-8(16)4-3-5-10(11)20-15(12,2)14(7)19/h3-5,7,9,12,14,16-17,19H,6H2,1-2H3/t7-,9+,12-,14+,15-/m0/s1