Pyrogram of (A) undigested softwood and (B) termite feces (1 mg) with added internal standard (3,5-dimethoxyphenol, 50 μg). Numbers areas in Table 1. IS = internal standard. The peaks labeled from 41I to 43I are novel compounds that appeared in the fecal sample after digestion by termites. The new peaks and the IS are labeled by arrows and numbers; all the other phenolics and levoglucosan are labeled by arrows only. The structures of the labeled compounds are shown in Figure 3.