InChI=1S/C16H22O5/c1-15(2)7-11(18)8-5-10(17)14-9(13(8)21-15)6-12(20-14)16(3,4)19/h6,10,12,14,17,19H,5,7H2,1-4H3/t10-,12-,14+/m0/s1