{'fraction_non_alphanumeric': 0.05238095238095238, 'fraction_numerical': 0.01904761904761905, 'mean_word_length': 5.12621359223301, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Isolation and identification of lipids from the silkworm (Bombyx mori) droppings

Silkworm (Bombyx mori) droppings were extracted with 80% aqueous MeOH, and the concentrated extract was partitioned successively with EtOAc, n-BuOH, and H2O. Three lipids were isolated from the EtOAc fraction by repeated silica gel and ODS column chromatography. Physico-chemical data including NMR, MS, and IR indicated that the isolated lipids were β-sitosterol (1), corchorifatty acid E methyl ester (2), and (8E)-10-hydroxydec-8-enoic acid methyl ester (3). Compounds 2 and 3 have, prior to this study, not previously been documented in nature.