24392
Results and discussion : Lyophilized microparticles exhibited vanishment of crystallinity of drug in XRPD analysis , the enfeeblement of carbonyl ( C = O ) stretching bands of carboxyl group in BDS in FT - IR spectra and the disappearance of endothermic peak of drug in the results of DSC study .
 Chemical: carbonyl; Chemical: C = O; Chemical: carboxyl; Chemical: BDS
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: carbonyl; Chemical: C = O; Chemical: carboxyl; Chemical: BDS