2853
Pharmacokinetic analyses in 21 patients revealed Pirarubicin plasma T 1 / 2 alpha ( + / - SE ) of 2 . 5 + / - 0 . 85 minutes , T beta 1 / 2 of 25 . 6 + / - 6 . 5 minutes , and T 1 / 2 gamma of 23 . 6 + / - 7 . 6 hours .
 Pirarubicin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Pirarubicin