20861
Synthesis of the target compounds was readily accomplished in good yields through a cyclisation reaction between indole - 3 - carboxylic acid hydrazide and carbon disulfide under basic conditions , followed by S - benzylation .
 Chemical: indole - 3 - carboxylic acid hydrazide; Chemical: carbon disulfide; Chemical: S
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: indole - 3 - carboxylic acid hydrazide; Chemical: carbon disulfide; Chemical: S