title: [Heterocyclic ketenethioacetal derivatives. VIII. Synthesis of ketenethioacetals having pyridinium salt (author's transl)].
mesh_terms: D000478:Alkylation; D007454:Iodides; D011726:Pyridinium Compounds / Q000138:chemical synthesis*
chemical_list: D007454:Iodides; D011726:Pyridinium Compounds