{'fraction_non_alphanumeric': 0.011278195488721804, 'fraction_numerical': 0.0, 'mean_word_length': 5.495934959349594, '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}}
Studies on the formation and activity of the transformation product of ampicillin.

When ampicillin was injected into a healthy volunteer and experimental animals, an unknown substance with an antimicrobial activity was recovered in the urine together with unchanged ampicillin. This unknown substance was also formed when ampicillin was incubated with urine, serum or homogenate of rat tissues. The causative agent responsible for this new transformation product seemed to be of low molecular weight and stable to heat. This transformation product showed a lower antimicrobial activity than ampicillin against some gram-negative bacteria. The concentrations of this product in the serum and urine of a healthy volunteer receiving ampicillin intramuscularly were far lower than those of ampicillin.