  We consider a non-supersymmetric example of the AdS/CFT duality which
generalizes the supersymmetric exactly marginal deformation constructed in
hep-th/0502086. The string theory background we use was found in hep-th/0503201
from the AdS_5 x S5 by a combination of T-dualities and shifts of angular
coordinates. It depends on three real parameters gamma_i which determine the
shape of the deformed 5-sphere. The dual gauge theory has the same field
content as N=4 SYM theory, but with scalar and Yukawa interactions ``deformed''
by gamma_i-dependent phases. The special case of equal deformation parameters
gamma_i=gamma corresponds to the N=1 supersymmetric deformation. We compare the
energies of semiclassical strings with three large angular momenta to the
1-loop anomalous dimensions of the corresponding gauge-theory scalar operators
and find that they match as it was the case in the SU(3) sector of the standard
AdS/CFT duality. In the supersymmetric case of equal gamma_i this extends the
result of our previous work (hep-th/0503192) from the 2-spin to the 3-spin
sector. This extension turns out to be quite nontrivial. To match the
corresponding low-energy effective ``Landau-Lifshitz'' actions on the string
theory and the gauge theory sides one is to make a special choice of the spin
chain Hamiltonian representing the 1-loop gauge theory dilatation operator.
This choice is adapted to low-energy approximation, i.e. it allows one to
capture the right vacuum states and the macroscopic spin wave sector of states
of the spin chain in the continuum coherent state effective action.
