17595
As a part of systematic investigation of synthesis and biological activities of indole analogues linked to various heterocyclic systems , we have synthesized new compounds viz . , 2 - amino - 4 - ( 5 ' - substituted 2 ' - phenyl - 1H - indol - 3 ' - yl ) - 6 - aryl - 4H - pyran - 3 - carbonitriles ( 2a - i ) , 4 , 5 - diamino - 6 - ( 5 ' - substituted 2 ' - phenyl - 1H - indol - 3 ' - yl ) - 8 - aryl - 2 - oxo - 2 , 6 - dihydrodipyrano [ 2 , 3 - b : 3 , 2 - e ] pyridine - 3 - carbonitriles ( 3a - i ) , 4 - amino - 5 - ( 5 ' - substituted 2 ' - phenyl - 1H - indol - 3 - yl ) - 7 - aryl - 1H - pyrano [ 2 , 3 - d ] pyrimidin - 2 ( 5H ) - ones ( 4a - i ) , 4 - amino - 5 - ( 5 ' - substituted 2 ' - phenyl - 1H - indol - 3 ' - yl ) - 7 - aryl - 1H - pyrano [ 2 , 3 - d ] pyrimidin - 2 ( 5H ) - thiones ( 5a - i ) , 4 - ( 5 ' - subtituted 2 ' - phenyl - 1H - indol - 3 ' - yl ) - 6 - aryl - 1 , 4 - dihydropyrano [ 2 , 3 - c ] pyrazol - 3 - amines ( 6a - i ) and 5 - ( 5 ' - substituted 2 ' - phenyl - 1H - indol - 3 ' - yl ) - 7 - aryl - 3H - pyrano [ 2 , 3 - d ] pyrimidin - 4 ( 5H ) - ones ( 7a - i ) .
 Chemical: indole; Chemical: 2 - amino - 4 - ( 5 ' - substituted 2 ' - phenyl - 1H - indol - 3 ' - yl ) - 6 - aryl - 4H - pyran - 3 - carbonitriles; Chemical: 4 , 5 - diamino - 6 - ( 5 ' - substituted 2 ' - phenyl - 1H - indol - 3 ' - yl ) - 8 - aryl - 2 - oxo - 2 , 6 - dihydrodipyrano [ 2 , 3 - b : 3 , 2 - e ] pyridine - 3 - carbonitriles; Chemical: 4 - amino - 5 - ( 5 ' - substituted 2 ' - phenyl - 1H - indol - 3 - yl ) - 7 - aryl - 1H - pyrano [ 2 , 3 - d ] pyrimidin - 2 ( 5H ) - ones; Chemical: 4 - amino - 5 - ( 5 ' - substituted 2 ' - phenyl - 1H - indol - 3 ' - yl ) - 7 - aryl - 1H - pyrano [ 2 , 3 - d ] pyrimidin - 2 ( 5H ) - thiones; Chemical: 4 - ( 5 ' - subtituted 2 ' - phenyl - 1H - indol - 3 ' - yl ) - 6 - aryl - 1 , 4 - dihydropyrano [ 2 , 3 - c ] pyrazol - 3 - amines; Chemical: 5 - ( 5 ' - substituted 2 ' - phenyl - 1H - indol - 3 ' - yl ) - 7 - aryl - 3H - pyrano [ 2 , 3 - d ] pyrimidin - 4 ( 5H ) - ones
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: indole; Chemical: 2 - amino - 4 - ( 5 ' - substituted 2 ' - phenyl - 1H - indol - 3 ' - yl ) - 6 - aryl - 4H - pyran - 3 - carbonitriles; Chemical: 4 , 5 - diamino - 6 - ( 5 ' - substituted 2 ' - phenyl - 1H - indol - 3 ' - yl ) - 8 - aryl - 2 - oxo - 2 , 6 - dihydrodipyrano [ 2 , 3 - b : 3 , 2 - e ] pyridine - 3 - carbonitriles; Chemical: 4 - amino - 5 - ( 5 ' - substituted 2 ' - phenyl - 1H - indol - 3 - yl ) - 7 - aryl - 1H - pyrano [ 2 , 3 - d ] pyrimidin - 2 ( 5H ) - ones; Chemical: 4 - amino - 5 - ( 5 ' - substituted 2 ' - phenyl - 1H - indol - 3 ' - yl ) - 7 - aryl - 1H - pyrano [ 2 , 3 - d ] pyrimidin - 2 ( 5H ) - thiones; Chemical: 4 - ( 5 ' - subtituted 2 ' - phenyl - 1H - indol - 3 ' - yl ) - 6 - aryl - 1 , 4 - dihydropyrano [ 2 , 3 - c ] pyrazol - 3 - amines; Chemical: 5 - ( 5 ' - substituted 2 ' - phenyl - 1H - indol - 3 ' - yl ) - 7 - aryl - 3H - pyrano [ 2 , 3 - d ] pyrimidin - 4 ( 5H ) - ones