18552
In this review firstly aspects of the physicochemical properties and production of ( 89 ) Zr are emphasized as well as important items that have to be taken into account for current good manufacturing practice ( cGMP ) compliant production of ( 89 ) Zr - labeled proteins .
 ( 89 ) Zr, ( 89 ) Zr
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ( 89 ) Zr, ( 89 ) Zr