C20H15NOS, triclinic, P (1) over bar (No. 2), a = 8.632(2) Angstrom, b = 13
.730(3) Angstrom, c = 14.765(3)Angstrom, alpha = 64.83(3)degrees, beta = 89
.54(3)degrees. gamma = 80.85(3)degrees, V = 1560.1 Angstrom(3), Z = 4, R-gt
(F) = 0.051, R-w(F-2) = 0.088, T = 293 K.