InChI=1S/C21H28N2O7/c1-10(2)8-13(15-9-11-4-3-5-14(24)17(11)21(29)30-15)23-20(28)19(27)18(26)12-6-7-16(25)22-12/h3-5,10,12-13,15,18-19,24,26-27H,6-9H2,1-2H3,(H,22,25)(H,23,28)/t12-,13+,15+,18+,19+/m1/s1