8409
In this study , a sensitive and rapid liquid chromatography - electrospray mass spectrometric ( LC / MS ) method has been developed for the determination of DRF - 4012 in tumour - bearing mice plasma , urine , feces and tissues ( liver , brain , lungs , heart , spleen , stomach , thigh muscle , kidneys , urinary bladder , small intestine and tumour ) .
 Chemical: DRF - 4012
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: DRF - 4012