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Hans Jürgen Klein
1951
Zur Synthese von Pyrazolo [1,5-a] pyrido [2,3-d] pyrimidin-9(4H)-onen
![Zur Synthese von Pyrazolo [1,5-a] pyrido [2,3-d] pyrimidin-9(4H)-onen](https://s3.amazonaws.com/readfeedstatic/book_covers/thumbnails/rf-placeholder.png)