InChI=1/C21H19N/c1-3-7-14(8-4-1)20-18-16-11-12-17(13-16)19(18)21(22-20)15-9-5-2-6-10-15/h1-10,16-17,22H,11-13H2/t16-,17+ D4D1E461CFF1A0E7