Azastilbene Analogs as Tyrosinase Inhibitors: New Molecules with Depigmenting Potential

Table 1

Spectral data of resveratrol analogs.

Compounds	𝛿CH=N	δ C=N	𝜈C=N	Melting point (°C)	Yield (%)
A	8.90	157.18	1625.8	160.0–161.0	78.0
B	8.62	158.46	1622.0	90.1–92.0	66.0
C	8.96	160.77	1631.6	149.0–150.3	90.0
D	8.50	158.84	1614.3	118.0–119.0	50.0
E	8.69	159.73	1625.8	90.8–91.5	83.0
F	8.63	158.87	1623.9	118.7–119.6	72.0

*The NMR experiments were performed at 300 MHz for ¹H and 75 MHz for ¹³C in dimethyl sulfoxide (DMSO-𝑑₆) (ppm) and I.R. experiments were performed at KBr support (cm⁻¹).