21156
The utility of this transformation is highlighted in the five - step syntheses of the natural products ( + ) - naseseazine A and B .
 Chemical: ( + ) - naseseazine A and B
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: ( + ) - naseseazine A and B