3,5-Difluorophenacetyl hydrazide 

PN: 4656-3-51

CAS: 797784-29-3

Molecule Weight: 186.162

Formula: C8H8F2N2O

2-(3-Fluorophenyl)acetamide

PN: 4648-3-0S

CAS: 370-45-6

Molecule Weight: 153.156

Formula: C8H8FNO

4-Fluorophenacetyl hydrazide 

PN: 4656-3-50

CAS: 34547-28-9

Molecule Weight: 168.171

Formula: C8H9FN2O

Pentafluorophenylacetamide

PN: 4648-3-3B

CAS: 653-20-3

Molecule Weight: 225.118

Formula: C8H4F5NO