Left panel: ¹²CO(1–0) integrated intensity contours observed with the IRAM PdBI+30 m toward the center of NGC 3627. The white star marks the coordinates of the dynamical center of the galaxy coincident with our phase tracking center (see Table 1), with offsets in arcseconds. The map, derived with 2σ clipping, has not been corrected for primary beam attenuation. The rms noise level is σ = 0.16   Jy   beam^-1   km   s^-1 and contour levels run from 3σ to 33σ with 6σ spacing and from 39σ to the maximum with 18σ spacing. In this map the  ± 200   km   s^-1 velocity range is used. The beam of 21  ×  13 is plotted in the lower left. Right panel: same for ¹²CO(2–1). The rms noise level is σ = 0.30   Jy   beam^-1   km   s^-1 and contour levels run from 3σ to 39σ with 6σ spacing and from 45σ to the maximum with 18σ spacing. The beam of 09  ×  06 is plotted at lower left.