Table 1. Experimental details.

	(I)	(II)	(III)	(IV)
Crystal data
Chemical formula	C14H13N3O4	C22H22N4O4	C15H13N3O2	C15H16N2O4S
M r	287.27	406.44	267.28	320.36
Crystal system, space group	Triclinic, P	Triclinic, P	Monoclinic, P21/n	Tetragonal, I41/a
Temperature (K)	100	100	100	100
a, b, c (Å)	7.235 (2), 7.282 (2), 13.512 (4)	8.1121 (7), 10.1819 (8), 13.1018 (11)	7.4871 (5), 16.270 (1), 10.8432 (7)	20.4639 (13), 20.4639 (13), 14.3952 (14)
α, β, γ (°)	88.714 (5), 85.131 (5), 67.239 (5)	93.466 (1), 106.595 (1), 106.932 (1)	90, 94.384 (1), 90	90, 90, 90
V (Å3)	654.0 (4)	979.88 (14)	1317.00 (15)	6028.3 (10)
Z	2	2	4	16
Radiation type	Mo Kα	Mo Kα	Mo Kα	Mo Kα
μ (mm−1)	0.11	0.10	0.09	0.24
Crystal size (mm)	0.20 × 0.10 × 0.02	0.20 × 0.10 × 0.05	0.40 × 0.20 × 0.10	0.40 × 0.20 × 0.20
Data collection
Diffractometer	Bruker APEX DUO CCD area-detector diffractometer	Bruker APEX DUO CCD area-detector diffractometer	Bruker APEX DUO CCD area-detector diffractometer	Bruker APEX DUO CCD area-detector diffractometer
Absorption correction	Multi-scan (SADABS; Sheldrick, 1996 ▶)	Multi-scan (SADABS; Sheldrick, 1996 ▶)	Multi-scan (SADABS; Sheldrick, 1996 ▶)	Multi-scan (SADABS; Sheldrick, 1996 ▶)
T min, T max	0.978, 0.998	0.981, 0.995	0.964, 0.991	0.912, 0.955
No. of measured, independent and observed [I > 2σ(I)] reflections	9039, 3158, 2288	17364, 6868, 5289	23007, 4732, 4189	52424, 5524, 5155
R int	0.027	0.018	0.018	0.018
(sin θ/λ)max (Å−1)	0.661	0.767	0.765	0.765
Refinement
R[F 2 > 2σ(F 2)], wR(F 2), S	0.040, 0.104, 1.03	0.043, 0.121, 1.03	0.038, 0.113, 1.04	0.029, 0.086, 1.06
No. of reflections	3158	6868	4732	5524
No. of parameters	242	359	233	263
H-atom treatment	All H-atom parameters refined	All H-atom parameters refined	All H-atom parameters refined	All H-atom parameters refined
Δρmax, Δρmin (e Å−3)	0.29, −0.26	0.57, −0.21	0.56, −0.20	0.51, −0.31

Computer programs: APEX2 (Bruker, 2005 ▶), SHELXS97 (Sheldrick, 2008 ▶), SHELXL97 (Sheldrick, 2008 ▶) and CrystalMaker (Palmer, 2013 ▶).