InChI=1/C20H21NO4/c1-2-4-14(5-3-1)15-11-20(21-6-8-22-9-7-21)25-17-12-19-18(10-16(15)17)23-13-24-19/h1-5,10,12,15,20H,6-9,11,13H2/t15-,20+/m0/s1 28E128AD76742704