Identification of Digestive Enzyme Inhibitors from Ludwigia octovalvis (Jacq.) P.H.Raven

Table 2

Nuclear Magnetic Resonance (NMR) ¹³C data of the compounds contained in C1F1 and C4F4–P fractions and previously reported data for ethyl gallate and isoorientin.

Carbon position	Chemical shifts (ppm)
	Ethyl gallate	C1F1	Isoorientin	C4F4–P
1	121.9	121.95	–	–
2	110.1	110.18	163.44	163.61
3	146.4	146.57	102.38	102.78
4	139.6	139.79	181.45	181.84
5	146.4	146.57	160.59	160.67
6	110.1	110.18	108.88	108.86
7	168.6	168.69	163.44	163.23
8	61.6	61.81	93.73	93.46
9	14.6	14.73	156.27	156.16
10	–	–	102.79	103.38
1′	–	–	121.56	121.4
2′	–	–	118.82	118.95
3′	–	–	116.00	116.02
4′	–	–	150.44	149.68
5′	–	–	145.95	145.72
6′	–	–	112.92	113.29
1^″	–	–	73.18	73.02
2^″	–	–	70.50	70.60
3^″	–	–	78.95	78.93
4^″	–	–	70.19	70.17
5^″	–	–	81.35	81.56
6^″	–	–	61.34	61.48