Pleuromutilin derivatives having a purine ring. Part 2: Influence of the central spacer on the antibacterial activity against Gram-positive pathogensHIROKAWA, Yoshimi; KINOSHITA, Hironori; TANAKA, Tomoyuki et al.Bioorganic & medicinal chemistry letters (Print). 2009, Vol 19, Num 1, pp 170-174, issn 0960-894X, 5 p.Article

Pleuromutilin derivatives having a purine ring. Part 3: Synthesis and antibacterial activity of novel compounds possessing a piperazine ring spacerHIROKAWA, Yoshimi; KINOSHITA, Hironori; TANAKA, Tomoyuki et al.Bioorganic & medicinal chemistry letters (Print). 2009, Vol 19, Num 1, pp 175-179, issn 0960-894X, 5 p.Article