Urgent - help Using an Excel formula in VBA

The formula is: =IF(Input!R703<0,HPLNK(Input!R703,Entity,Category6 ,$A$677&"."&$A703,N$3,Frequency1,Application1),HPL NK(Input!R703,Entity,Category6,"P1709"&"."&$A703,N $3,Frequency1,Application1))
This works fine is excel so I know the syntax is ok with Excel

When I try this in VB:
Range("N679").Select
Selection.Formula = "=IF(Input!R679<0,HPLNK(Input!R679,Entity,Category 6,$A$677&"."&$A679,N$3,Frequency1,Application1),HP LNK(Input!R679,Entity,Category6,"P1709"&"."&$A679, N$3,Frequency1,Application1))"

I get a compile error with syntax

Can you help?