  We report on a systematic perturbative study of three-point functions in
planar SU(N) N=4 super Yang-Mills theory at the one-loop level involving scalar
field operators up to length five. For this we have computed a sample of 40
structure constants involving primary operators of up to and including length
five which are built entirely from scalar fields. A combinatorial dressing
technique has been developed to promote tree-level correlators to one-loop
level. In addition we have resolved the mixing up to the order (g_YM)^2 level
of the operators involved, which amounts to mixings with bi-fermions, with
bi-derivative insertions as well as self-mixing contributions in the scalar
sector. This work supersedes a preprint by two of the authors from 2010 which
had neglected the mixing contributions.
