“…benzylidene-9H-fluoren-2-yl)-3-phenylthiourea (5q): Yield 92%, m.p. 148-149 ºC; IR (, cm -1 ): 3217 (NH), 3051 and 3018 (C=C-H, Aromatic C-H), 1539 (S=C-N-H), 1255 (C-N); 1 H NMR (300 MHz, DMSO-d 6 , ppm): 7.25 (t, 1H, J = 7.9 Hz, =CH), 7.43-7.94 (m, 17H, Ar-H),9.73 (s, 1H, -NH),9.82 (s, 1H, -NH);13 C NMR (75 MHz, DMSO-d 6 , ppm): 120.2, 120.4, 120.8, 121.4, 124.4, 124.6, 125.1, 127.5, 129.0, 129.4, 129.8, 130.0, 135.6, 136.5, 137.9, 138.8, 140.0, 140.2, 180.0; Anal. Calcd.…”