13526
A cobalt chlorin complex ( Co ( II ) ( Ch ) ) efficiently and selectively catalyzed two - electron reduction of dioxygen ( O ( 2 ) ) by one - electron reductants ( ferrocene derivatives ) to produce hydrogen peroxide ( H ( 2 ) O ( 2 ) ) in the presence of perchloric acid ( HClO ( 4 ) ) in benzonitrile ( PhCN ) at 298 K .
 Chemical: cobalt chlorin; Chemical: Co ( II ) ( Ch ); Chemical: dioxygen; Chemical: O ( 2 ); Chemical: ferrocene; Chemical: hydrogen peroxide; Chemical: H ( 2 ) O ( 2 ); Chemical: perchloric acid; Chemical: HClO ( 4 ); Chemical: benzonitrile; Chemical: PhCN
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: cobalt chlorin; Chemical: Co ( II ) ( Ch ); Chemical: dioxygen; Chemical: O ( 2 ); Chemical: ferrocene; Chemical: hydrogen peroxide; Chemical: H ( 2 ) O ( 2 ); Chemical: perchloric acid; Chemical: HClO ( 4 ); Chemical: benzonitrile; Chemical: PhCN