28662
Abstract This study investigates the solid - solid interactions between nimodipine ( NIM ) and polyethylene glycol ( PEG ) of different mean molecular weights ( PEG 2000 , 4000 and 6000 ) , in solid dispersion systems , applying differential scanning calorimetry ( DSC ) , Fourier - Transform infrared spectroscopy , powder X - ray diffraction ( PXRD ) , hot stage microscopy ( HSM ) and theoretical modeling by the Flory - Huggins ( FH ) solution theory .
 Chemical: nimodipine; Chemical: NIM; Chemical: polyethylene glycol; Chemical: PEG; Chemical: PEG 2000 , 4000 and 6000
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: nimodipine; Chemical: NIM; Chemical: polyethylene glycol; Chemical: PEG; Chemical: PEG 2000 , 4000 and 6000