%0 Journal Article %T Extraction and analysis of chemical modification patterns in drug development. %A Shigemizu, Daichi %A Araki, Michihiro %A Okuda, Shujiro %A Goto, Susumu %A Kanehisa, Minoru %J Journal of Chemical Information and Modeling %V 49 %N 4 %P 1122-9 %@ 1549-9596 %D 2009-06-16 %~ DeepDyve