\/I tempts have been reported.'We have been engaged for some time in an attempt to synthesize derivatives of such a ring system which might be compared with certain degradation products of the morphine alkaloids. Such a synthesis would offer a rigorous solution to the question of the point of attachment of the ethanamine side chain of morphine. The appearance in recent months of several publicationsla* cd bearing on this general ...
![cyano-(3-hydroxy-4-oxo-4H-[1]naphthyliden)-acetic acid ethyl ester Structure](https://image.chemsrc.com/caspic/275/643727-02-0.png)