Velocity integrated intensity maps (contours and colour) of HCN(4–3), HCN(3–2), HNC(4–3), H₂CO(5_1,5–4_1,4), CH₃OH(1_1,1–0_0,0), CH₃OH(5_2,3–4_1,3), CH₃OH(7_1,6–6_1,5) and CH₃OH(7_2,6–6_2,4) detected in the coma of comet Lemmon in blue and model counterparts (Sect. 4) in green. Colours indicate intensity and contours are in steps of 30σ for HCN(4–3), 10σ for HCN(3–2), 3σ for H₂CO(5_1,5–4_1,4), CH₃OH(1_1,1–0_0,0), CH₃OH(7_1,6–6_1,5) and CH₃OH(7_2,6–6_2,4), starting at 6σ for CH₃OH(1_1,1–0_0,0), CH₃OH(7_1,6–6_1,5) and CH₃OH(7_2,6–6_2,4) and 1σ for HNC(4–3) and CH₃OH(5_2,3–4_1,3) starting at 3σ and 2σ respectively where σ is the RMS noise in each map. Crosses mark the peak continuum emission.