3503
Systemic exposure to these active peptides is low in rats and humans , and the low systemic and portal vein concentrations of linaclotide and MM - 419447 observed in the rat confirmed both peptides are minimally absorbed after oral administration .
 Chemical: linaclotide; Chemical: MM - 419447
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: linaclotide; Chemical: MM - 419447