InChI=1S/C22H21NO5/c1-8-6-12(24)14-11-7-9(2)23-17(11)18(25)16-15(14)13(8)20-22(27,19(16)26)21(4,5)10(3)28-20/h6-7,10,23-24,27H,1-5H3/t10-,22+/m0/s1