10041
The experimental C = O stretching feature of cis - [ Pt ( NH ( 3 ) ) ( 2 ) ( G ) Cl ] ( + ) at 1718 cm ( - 1 ) , remarkably red - shifted with respect to an unperturbed C = O stretching mode , is indicative of a lengthened CO bond in guanine , a signature that this group is involved in hydrogen bonding .
 Chemical: C = O; Chemical: cis - [ Pt ( NH ( 3 ) ) ( 2 ) ( G ) Cl ] ( + ); Chemical: C = O; Chemical: CO; Chemical: guanine; Chemical: hydrogen
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: C = O; Chemical: cis - [ Pt ( NH ( 3 ) ) ( 2 ) ( G ) Cl ] ( + ); Chemical: C = O; Chemical: CO; Chemical: guanine; Chemical: hydrogen