Evaluation of Antiulcer and Cytotoxic Potential of the Leaf, Flower, and Fruit Extracts of Calotropis procera and Isolation of a New Lignan Glycoside

Table 1

¹H (500 MHz) and ¹³C (125 MHz) NMR spectroscopic data of compound 1 (DMSO-d6).

Position	δ (H)	δ (C)
1	—	136.0
2	8.16 (m)	118.5
3	—	149.3
4	—	147.7
5	7.15 (d, 5.0)	116.4
6	6.93 (s)	109.7
7	4.71 (br s)	85.6
8	3.05 (br s)	54.0
9	4.18 (br d)	71.37
1′	—	132.4
2′	7.00 (s)	110.2
3′	—	145.7
4′	—	145.9
5′	6.88 (d, 5.0)	114.9
6′	6.76 (m)	118.7
7′	4.67 (br s)	85.9
8′	3.05 (br s)	53.8
9′	3.75 (br d)	71.32
3-OCH3	3.84 (s)	55.5
7′-OCH3	3.83 (s)	55.2
1′′	4.94 (br s)	101.2
2′′	3.58 (m)	73.4
3′′	3.47 (m)	76.6
4′′	3.58 (m)	69.9
5′′	3.75 (m)	76.2
6′′	3.89 (br d, 5.0)	61.1
	3.75 (m)

δ in ppm and in Hz.