24291
By varying the substituents ( R ( 1 ) ) at the indolin - 2 - one scaffold , a series of indolin - 2 - one derivatives bearing 4 - phenylpiperazine - 1 - carbothiohydrazide moiety at the C3 - position were synthesized and evaluated for their antiproliferative activity against three human cancer cell lines .
 Chemical: indolin - 2 - one; Chemical: indolin - 2 - one; Chemical: 4 - phenylpiperazine - 1 - carbothiohydrazide
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: indolin - 2 - one; Chemical: indolin - 2 - one; Chemical: 4 - phenylpiperazine - 1 - carbothiohydrazide