178 



from Olie side of' the tetraiiiethjleiie ring to another an o-dioxy-f- 

 truxillic acid is formed. 



Bj melting with KOII A-biscoumaric acid is converted into 

 (f-biscon marie acid, crystallizing in needles melting at 157°. 



I iiope to make fnrther commnnications on other |)ossible trans- 

 formations of the bisconmaric acids, while it will also be tried to 

 obtain them from the trnxillic acids, by which the proposed names 

 and the structnral formulae will obtain more security. 



Laboratory of the Colonial Museum, Haarlem. 



