12159
Synthesis and biological evaluation as microtubule - active agents of several tetrahydrofuran and spiroacetal derivatives .
 Chemical: tetrahydrofuran; Chemical: spiroacetal
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: tetrahydrofuran; Chemical: spiroacetal