InChI=1/C18H20N4O/c19-11-15-7-8-16(12-20)22(15)17(23)13-21-18(9-4-10-18)14-5-2-1-3-6-14/h1-3,5-6,15-16,21H,4,7-10,13H2/t15-,16+ C4163336A036484A