With his 9th publication on that topic in 1889 , he concluded that the structure of papaverine had been solved .
In the following five years , Goldschmiedt focused on the determination of the structure of papaverine -- a compound found in poppy seed and opium .
With Goldschmiedt 's 9th publication on that topic in 1889 , Goldschmiedt concluded that structure structure of papaverine had been solved .
In the following five years , Goldschmiedt focused on the determination of the structure of papaverine -- a compound found in poppy seed and opium .