Left: Combined ALMA 1.3 mm continuum map of I19074 with 26 cores overlaid (gray ellipses). The gray dashed contour marks the 2 σ_{1.3 mm} boundary. Protostellar cores are marked as green stars. Right: ALMA-alone 1.3 mm continuum map with black contours ([3, 5, 10, 20, 40, 80, and 160] × σ_{1.3 mm}, σ_{1.3 mm}=0.08 mJy beam⁻¹). Hierarchical structures Fn and Fs are bounded by the gray dashed contour at the 2 σ_{1.3 mm} level. Blue plus marks the position of identified UC H II region by Lu et al. (2018). The synthesized beam and 0.5 pc scale bar are shown in right corners.