  Aperture synthesis observations of CO(J=1-0) emission and near-infrared
broad-band photometry of the non-barred Seyfert galaxy NGC 5033 (D = 18.7 Mpc)
were performed. Our 3".9 x 3".6 resolution CO observations reveal a perturbed
distribution and the kinematics of molecular gas in the center of NGC 5033; we
find the characteristic gaseous features that are widely observed in barred
spiral galaxies, such as two bright CO peaks near the center (separated by ~
3'' or 270 pc from the nucleus), two offset ridges of CO emission emanating
from the CO peaks, and a CO ring (with a radius of ~ 14'' or 1.3 kpc).
Double-peaked velocity profiles are also evident near the two CO peaks,
implying that these CO peaks are orbit crowding zones in a barred/oval
potential. Although NIR data only give an upper limit of the possible bar
lengths, due to a large inclination of the NGC 5033 disk (i = 68 deg), our CO
data clearly suggests the presence of a small (the semi-major axis of about
12'' - 15'' or 1.1 - 1.4 kpc) nuclear bar (or oval structure) in the center of
the ``non-barred'' galaxy NGC 5033. Our results demonstrate that
high-resolution CO imaging-spectroscopy is useful to search for nuclear bars,
even in highly inclined systems where isophoto fitting techniques are not
applicable. We find that the gas mass-to-dynamical mass ratio, M_gas/M_dyn, is
small (< 1%) within a radius of 2'' or 180 pc, in contrast to starburst nuclei.
This implies that the starburst does not cohabitate in the type-1.5 Seyfert
nucleus of N GC 5033.
