18100
This study was to explore the effect of DNA methyltransferase inhibitor 5 - Aza - 2 ' - deoxycytidine ( Aza - CdR ) on PDGF - induced rat ASM cell phenotypic switching and biological behaviors .
 Chemical: 5 - Aza - 2 ' - deoxycytidine; Chemical: Aza - CdR
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: 5 - Aza - 2 ' - deoxycytidine, Aza - CdR 
Answer:
 Chemical: 5 - Aza - 2 ' - deoxycytidine; Chemical: Aza - CdR