755
Cardiac ultrasound was performed to investigate these findings in subjects during long - term enzyme replacement therapy ( ERT ) with recombinant human arylsulfatase B ( rhASB , rhN - acetylgalactosamine 4 - sulfatase , galsulfase , Naglazyme (R) ) .
 rhN - acetylgalactosamine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 rhN - acetylgalactosamine