InChI=1S/C17H21NO4/c1-21-11-3-2-9-8-12-17(20)5-4-10(19)15-16(17,6-7-18-12)13(9)14(11)22-15/h2-3,10,12,15,18-20H,4-8H2,1H3/t10-,12+,15-,16-,17+/m0/s1