title: Reactivity of Thioaldehyde: Cyclization Reaction of 6-Amino-1,3-dimethyl-5- thioformyluracil with Enamines into Pyrido[2,3-d]pyrimidine-2,4-(1H,3H)-diones.
authors.affiliation: Laboratory of Medicinal Chemistry, Gifu Pharmaceutical University, Mitahora-higashi, Gifu 502, Japan.
authors.forename: Kosaku
authors.initials: K
authors.lastname: Hirota
authors.forename: Keiko
authors.initials: K
authors.lastname: Kubo
authors.forename: Hironao
authors.initials: H
authors.lastname: Sajiki
authors.forename: Yukio
authors.initials: Y
authors.lastname: Kitade
authors.forename: Magoichi
authors.initials: M
authors.lastname: Sako
authors.forename: Yoshifumi
authors.initials: Y
authors.lastname: Maki