"Penicillanic Acid" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.
Below are MeSH descriptors whose meaning is more general than "Penicillanic Acid".
Below are MeSH descriptors whose meaning is related to "Penicillanic Acid".
Below are MeSH descriptors whose meaning is more specific than "Penicillanic Acid".