20943
Three of our biologically active 2 - amino - 1 , 4 - naphthoquinone N , O - acetals and N , S - acetals tested against hospital bacterial strains were identified as potential lead compounds .
 Chemical: 2 - amino - 1 , 4 - naphthoquinone; Chemical: N , O - acetals; Chemical: N , S - acetals
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: 2 - amino - 1 , 4 - naphthoquinone; Chemical: N , O - acetals; Chemical: N , S - acetals