InChI=1/C16H20O4/c1-10-4-5-16(8-17)7-13(10)15(20-9-16)12-3-2-11(18)6-14(12)19/h2-4,6,13,15,17-19H,5,7-9H2,1H3/t13-,15+,16-/m1/s1 04E1F1005D424844