InChI=1/C19H20O2/c1-3-15-17-10-9-14(21)11-18(17)16(4-2)19(15)12-5-7-13(20)8-6-12/h5-11,16,20-21H,3-4H2,1-2H3/t16-/m1/s1 31816F70527CCEC2