4721
The ( 68 ) Ga labeling yield for carboxylate - type chelators NOTA and DOTA is decreased at lower metal ion contaminant concentrations compared with phosphinate - type chelators TRAP and NOPO .
 Chemical: ( 68 ) Ga; Chemical: carboxylate; Chemical: NOTA; Chemical: DOTA; Chemical: phosphinate; Chemical: TRAP; Chemical: NOPO
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: ( 68 ) Ga; Chemical: carboxylate; Chemical: NOTA; Chemical: DOTA; Chemical: phosphinate; Chemical: TRAP; Chemical: NOPO