3765
We conducted a double - blind , randomized phase II study to evaluate the safety and activity of combination therapy with N - butyl - deoxynojirimycin ( SC - 48334 ) ( an alpha - glucosidase I inhibitor ) and zidovudine versus zidovudine alone .
 Chemical: N - butyl - deoxynojirimycin; Chemical: SC - 48334; Chemical: zidovudine; Chemical: zidovudine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: N - butyl - deoxynojirimycin; Chemical: SC - 48334; Chemical: zidovudine; Chemical: zidovudine