HPTLC Fingerprint Profile and Identification of Antidiabetic and Antioxidant Leads from Bauhinia rufescens L

Table 4

¹H- and ¹³C-NMR assignments of compound 2 (700 MHz, DMSO) in comparison with reported data for rutin (quercetin-3-orutinoside) (100 MHz, CD3OD) [27].

Position	δH compound (2)	δH rutin	δC compound (2)	δC rutin
2		—	158.08	158.22
3		—	134.70	134.52
4		—	178.21	178.39
5		—	162.88	162.48
6	6.44	6.10 s	99.70	99.72
7		—	166.0	166.58
8	6.77	6.28 s	94.84	94.90
9		—	159.06	158.91
10		—	105.99	105.32
1′		—	120.73	122.77
2′		7.64 s	119.34	117.37
3′		—	144.00	144.32
4′		—	150.00	150.23
5′	6.90 d	6.85 d	115.67	115.46
6′	7.77 d	7.63 d	120.51	122.47
1″	5.22–5.27	4.96 d	103.69	103.63
2″	5.22–5.27	4.96 d	76.00	74.64
3″	5.22–5.27	4.96 d	70.65	—
4″	3.11–3.97 m	3.20–3.90 m	70.13	—
5″	3.11–3.97 m	3.20–3.90 m	70.01	—
1‴	4.69	4.50 d	101.53	101.92
2‴	4.69	4.50 d	71.79	71.32
3‴	4.69	4.50 d
4‴	3.11–3.97 m	3.20–3.90 m
5‴	3.11–3.97 m	3.20–3.90 m
6‴	3.11–3.97 m	3.20–3.90 m

δ = chemical shift in ppm, s = singlet, d = doublet, and m = multiplet.