18816
Four ruthenium ( ii ) asymmetric complexes , [ Ru ( bpy ) 2 ( PAIDH ) ] ( 2 + ) ( bpy = 2 , 2 ' - bipyridine , PAIDH = 2 - pyridyl - 1H - anthra [ 1 , 2 - d ] imidazole - 6 , 11 - dione , ) , [ Ru ( phen ) 2 ( PAIDH ) ] ( 2 + ) ( phen = 1 , 10 - phenanthroline , ) , [ Ru ( dmp ) 2 ( PAIDH ) ] ( 2 + ) ( dmp = 4 , 7 - dimethyl - 1 , 10 - phenanthroline , ) and [ Ru ( dip ) 2 ( PAIDH ) ] ( 2 + ) ( dip = 4 , 7 - diphenyl - 1 , 10 - phenanthroline , ) , have been synthesized and characterized .
 Chemical: ruthenium ( ii ); Chemical: [ Ru ( bpy ) 2 ( PAIDH ) ] ( 2 + ); Chemical: bpy; Chemical: 2 , 2 ' - bipyridine; Chemical: PAIDH; Chemical: 2 - pyridyl - 1H - anthra [ 1 , 2 - d ] imidazole - 6 , 11 - dione; Chemical: [ Ru ( phen ) 2 ( PAIDH ) ] ( 2 + ); Chemical: phen; Chemical: 1 , 10 - phenanthroline; Chemical: [ Ru ( dmp ) 2 ( PAIDH ) ] ( 2 + ); Chemical: dmp; Chemical: 4 , 7 - dimethyl - 1 , 10 - phenanthroline; Chemical: [ Ru ( dip ) 2 ( PAIDH ) ] ( 2 + ); Chemical: dip; Chemical: 4 , 7 - diphenyl - 1 , 10 - phenanthroline
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: ruthenium ( ii ); Chemical: [ Ru ( bpy ) 2 ( PAIDH ) ] ( 2 + ); Chemical: bpy; Chemical: 2 , 2 ' - bipyridine; Chemical: PAIDH; Chemical: 2 - pyridyl - 1H - anthra [ 1 , 2 - d ] imidazole - 6 , 11 - dione; Chemical: [ Ru ( phen ) 2 ( PAIDH ) ] ( 2 + ); Chemical: phen; Chemical: 1 , 10 - phenanthroline; Chemical: [ Ru ( dmp ) 2 ( PAIDH ) ] ( 2 + ); Chemical: dmp; Chemical: 4 , 7 - dimethyl - 1 , 10 - phenanthroline; Chemical: [ Ru ( dip ) 2 ( PAIDH ) ] ( 2 + ); Chemical: dip; Chemical: 4 , 7 - diphenyl - 1 , 10 - phenanthroline