1828
1 . Six healthy male subjects were given a single dose of 500 mg of [ 14C ] PTZ601 ( mean radioactivity 79 . 2 mu Ci ) by intravenous ( IV ) infusion over 1 h , and observed for 5 days post - dose during which pharmacokinetic ( PK ) samples were collected .
 Chemical: [ 14C ] PTZ601
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: [ 14C ] PTZ601