2H-Furylium

CAS:287-99-0

Formula:C4H5O

1-Cyclobuten-1-yloxy

CAS:67592-79-4

Formula:C4H5O

2-Butenyl, 4-oxo-, (Z)-

CAS:185757-41-9

Formula:C4H5O

2-Butenylium, 1-oxo-, (Z)-

CAS:111830-25-2

Formula:C4H5O

2-Butynyl, 1-hydroxy-

CAS:113439-78-4

Formula:C4H5O

Propenylium, 2-formyl-

CAS:113849-43-7

Formula:C4H5O

3-Furanyl, 2,3-dihydro-

CAS:74218-00-1

Formula:C4H5O

3-Butenyl, 2-oxo-

CAS:417707-29-0

Formula:C4H5O

Propyl, 1-methylene-2-oxo-

CAS:417707-30-3

Formula:C4H5O

1-Propenyl, 2-methyl-3-oxo-

CAS:417707-33-6

Formula:C4H5O