Isolation of Resveratrol from Vitis Viniferae Caulis and Its Potent Inhibition of Human Tyrosinase

Table 2

NMR data of purified compound X (resveratrol).

Assignment	𝛿^13C	𝛿^1H
1	140.91
2	105.70	6.562 (𝑑, J = 2.0 Hz)
3	159.59
4	102.69	6.291 (𝑡, J = 2.3 Hz)
5	159.59
6	105.70	6.562 (𝑑, J = 2.0 Hz)
7	129.13	6.902 (𝑑, J = 16.5 Hz)
8	129.99	7.035 (𝑑, J = 16.0 Hz)
1′	126.86
2′	128.74	7.435 (𝑑, J = 8.5 Hz)
3′	116.43	6.856 (𝑑, J = 9.0 Hz)
4′	158.16
5′	116.43	6.856 (𝑑, J = 9.0 Hz)
6′	128.74	7.433 (𝑑, J = 8.5 Hz)
3-OH		8.231 (s)
5-OH		8.231 (s)
3′-OH		8.491 (s)