InChI=1S/C16H23NO6.Na/c1-21-12-9-11(10-13(22-2)15(12)23-3)16(20)17-8-6-4-5-7-14(18)19;/h9-10H,4-8H2,1-3H3,(H,17,20)(H,18,19);/q;+1/p-1