%0 Conference Proceedings %T Regioselective synthesis of new 5H,10H-dipyrimido[2,1-b:4\\\',5\\\'-d][1,3]thiazine as a novel heterocyclic system %A Afrough, Toktam %A Bakavoli, Mehdi %A Eshghi, Hossein %J بیست و هفتمین سمینار شیمی آلی ایران %D 2019