Table 1

*Comp. No.*	M.P.0C Solvent	Color Yield%	Mol. Formula ( M.Wt.)	*Elemental analysis calc. / found%*
*Comp. No.*	M.P.0C Solvent	Color Yield%	Mol. Formula ( M.Wt.)	C	H	N	S
4a	276-277 EtOH	Pale brown 71.6	C₁₀H₉N₃OS (219)	54.79 54.88	4.11 4.22	19.17 19.00	14.61 14.60
4b	230-232 EtOH	Yellow 75.2	C₁₁H₁₁N₃OS (233)	56.65 56.66	4.72 4.66	18.02 18.22	13.73 13.71
4c	249-251 EtOH	Yellow 81	C₁₃H₁₅N₃OS (261)	59.77 59.55	5.74 5.89	16.09 15.99	12.26 12.26
4d	230-231 EtOH	Yellow 70.3	C₁₇H₂₃N₃OS (317)	64.35 64.34	7.25 7.45	13.24 13.33	10.09 10.11
8	266-268 EtOH	Pale yellow 61.1	C₈H₇N₃OS (193)	49.74 49.58	3.63 3.61	21.76 21.65	16.58 16.65
10	288-289 EtOH/ DMF	Yellowish green 63	C₁₃H₉N₃OS (255)	61.17 61.24	3.53 3.42	16.47 16.45	12.55 12.34

Table 1: Characterization data of compounds 4a-d, 8 and 10.