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| Names | |
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| IUPAC name 1-Methoxy-4-[(E)-2-(4-methoxyphenyl)ethenyl]benzene | |
| Other names Bianisal; Bianisylidene; p,p′-Dimethoxystilbene; 4,4′-Dimethoxystilbene | |
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| Properties | |
| C16H16O2 | |
| Molar mass | 240.302 g·mol−1 | 
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Photoanethole is a naturally occurring organic compound that is found in anise and fennel. [1] [2] It has estrogenic activity, and along with anethole and dianethole, may be responsible for the estrogenic effects of anise and fennel. [1] [3] [4] [5] [6] These compounds bear resemblance to the estrogens stilbene and diethylstilbestrol, which may explain their estrogenic activity. [1] [7] In fact, it is said that diethylstilbestrol and related drugs were originally modeled after photoanethole and dianethole. [1] [8]