28415
Phosphoramidate derivatives of ( E ) - 5 - ( 2 - bromovinyl ) - 2 ' - deoxyuridine ( BVDU ) that contain L - alanine or pivaloyloxymethyl iminodiacetate ( IDA - POM ) exhibit anti - HSV - 1 and anti - VZV activity in cell cultures , but they largely lost antiviral potency against TK - deficient virus strains .
 Chemical: Phosphoramidate; Chemical: ( E ) - 5 - ( 2 - bromovinyl ) - 2 ' - deoxyuridine; Chemical: BVDU; Chemical: L - alanine; Chemical: pivaloyloxymethyl iminodiacetate; Chemical: IDA - POM
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Phosphoramidate, ( E ) - 5 - ( 2 - bromovinyl ) - 2 ' - deoxyuridine, BVDU, L - alanine, pivaloyloxymethyl iminodiacetate, IDA - POM 
Answer:
 Chemical: Phosphoramidate; Chemical: ( E ) - 5 - ( 2 - bromovinyl ) - 2 ' - deoxyuridine; Chemical: BVDU; Chemical: L - alanine; Chemical: pivaloyloxymethyl iminodiacetate; Chemical: IDA - POM