14325
Didehydrostemofoline and eleven of its derivatives were synthesized and the cytotoxicity and their effect on doxorubicin , vinblastine and paclitaxel sensitivity in drug resistant ( KB - V1 and K562 / Adr ) and drug sensitive ( KB - 3 - 1 and K562 ) cell lines by a 3 - ( 4 , 5 - dimethylthiazol - 2 - yl ) - 2 , 5 - diphenyltetrazolium bromide ( MTT ) assay were determined .
 Chemical: Didehydrostemofoline; Chemical: doxorubicin; Chemical: vinblastine; Chemical: paclitaxel; Chemical: 3 - ( 4 , 5 - dimethylthiazol - 2 - yl ) - 2 , 5 - diphenyltetrazolium bromide; Chemical: MTT
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: Didehydrostemofoline; Chemical: doxorubicin; Chemical: vinblastine; Chemical: paclitaxel; Chemical: 3 - ( 4 , 5 - dimethylthiazol - 2 - yl ) - 2 , 5 - diphenyltetrazolium bromide; Chemical: MTT