2154-62-3

Name:
but-1-en-4-yl
Cas No.:
2154-62-3 
Formula:
C4H7  
Synonyms:

But-3-en-1-yl radical;but-1-en-4-yl; 

2154-59-8

Name:
difluoromethane
Cas No.:
2154-59-8 
Formula:
CF2  
Synonyms:

methylene, difluoro-;CF2;Difluoromethylene;difluoromethane;