[zilalti]

I am used to reading mass spectrums of elements with giant atomic stuctures e.g. copper and zinc so im finding this quite hard.
   At the moment I am looking at a mass spectrum for paracetemol (4-Hydroxy-(N-ethanoyl-aminobenzene)) which has four main m/z peaks at around 43, 80, 110 and 151.
I know fragmentation will occur but i cannot account for all of them. The peak at 151 can be accounted for the unfragmented molecule and 43 for a C2H3O group but what about the rest. I would have thought the c-c bond would be most easily broken but there is no evidence for any methyl radicals?
Help would be much appreciated

[sdekivit]

 the 43 is the loose carboxylgroup and the peak around 80 is probably the benzene.without the estergroup and the carboxylgroup.

the 110 is probably the whole molecule without the carboxylgroup.