InChI=1S/C13H20O3/c1-12(14)10-8-6-4-2-3-5-7-9-11-13(15)16/h2,4-5,7,9,11-12,14H,3,6,8,10H2,1H3,(H,15,16)/b4-2-,7-5+,11-9+