20881
Recently , the discovery of the aminoisoindoles as potent and selective inhibitors of beta - secretase was reported , including the close structural analogs compound ( S ) - 1 - pyridin - 4 - yl - 4 - fluoro - 1 - ( 3 - ( pyrimidin - 5 - yl ) phenyl ) - 1H - isoindol - 3 - amine [ ( S ) - 25 ] and ( S ) - 1 - ( 2 - ( difluoromethyl ) pyridin - 4 - yl ) - 4 - fluoro - 1 - ( 3 - ( pyrimidin - 5 - yl ) phenyl ) - 1H - isoindol - 3 - amine hemifumarate ( AZD3839 ) , the latter being recently progressed to the clinic .
 Chemical: aminoisoindoles; Chemical: ( S ) - 1 - pyridin - 4 - yl - 4 - fluoro - 1 - ( 3 - ( pyrimidin - 5 - yl ) phenyl ) - 1H - isoindol - 3 - amine; Chemical: ( S ) - 1 - ( 2 - ( difluoromethyl ) pyridin - 4 - yl ) - 4 - fluoro - 1 - ( 3 - ( pyrimidin - 5 - yl ) phenyl ) - 1H - isoindol - 3 - amine hemifumarate; Chemical: AZD3839
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: aminoisoindoles; Chemical: ( S ) - 1 - pyridin - 4 - yl - 4 - fluoro - 1 - ( 3 - ( pyrimidin - 5 - yl ) phenyl ) - 1H - isoindol - 3 - amine; Chemical: ( S ) - 1 - ( 2 - ( difluoromethyl ) pyridin - 4 - yl ) - 4 - fluoro - 1 - ( 3 - ( pyrimidin - 5 - yl ) phenyl ) - 1H - isoindol - 3 - amine hemifumarate; Chemical: AZD3839