Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KELLER Thomas H. and BRAY-FRENCH Katharine and DEMNITZ F.W. Joachim and MÜLLER Thomas and POMBO-VILLAR Esteban and WALKER Christoph,Synthesis and Structure-Activity Relationship of N-Arylrolipram Derivatives as Inhibitors of PDE4 Isozymes.,Chemical and Pharmaceutical Bulletin,00092363,The Pharmaceutical Society of Japan,2001,49,8,1009-1017,https://cir.nii.ac.jp/crid/1390282679138775296,https://doi.org/10.1248/cpb.49.1009