... Tetrahedron. Volume 57, Issue 18, 30 April 2001, Pages 4035–4038. ... C 22 H 18 N 6 O 3 , triclinic, space group P, a=8.635 (2), b=14.629 (3), c=17.779 (2), α=66.77 (2), β=83.73 (2), γ=82.5 (2)°, U=2042.0 (8) Å 3 , Z=4, D c =1.348 g cm −3 , crystal size 0.52×0.48×0.45 mm. ...