[Experiments with the synthesis of sulfur and nitrogen containing three-ring systems].
D055598:Chemical Phenomena; D002621:Chemistry; D006571:Heterocyclic Compounds; D009584:Nitrogen; D013455:Sulfur
D006571:Heterocyclic Compounds; D013455:Sulfur; D009584:Nitrogen
Versuche zur Darstellung von Schwefel und Stickstoff enthaltenden Dreiringsystemen.