A M von Esch

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Thirty-five female Sprague-Dawley weanling rats were fed 5-acetamido-3-(5-nitro-2-furyl)-6H-l ,2,4-oxadiazine for 37 weeks. All 32 rats surviving 28 weeks or more developed hemangioendothelialsarcomas at one or more sites. These unusual tumors were located in the livers of 31 rats, in the mesentery of 30 rats, and in the lungs of 5 rats. Nine rats developed(More)
Carcinogenicity of eight 5-nitrofurans with heterocyclic substituents at the 2-position of the furan ring was investigated by feeding the chemicals to Sprague-Dawley female rats. N-[5-(5-nitro-2-furyl)-1,3,4-thiadiazol-2-yl]acetamide induced in 30 rats the highest incidence of tumors with the greatest number of tissues involved: forestomach squamous cell(More)
Phosphonoacetic acid is a selective antiherpesvirus agent. More than 100 congeners of phosphonoacetic acid were evaluated in vitro and in vivo to understand structure-activity relationships in the hope of designing a superior analog. Results showed that the antiherpesvirus activity had highly specific structural requirements. Neither the carboxylic nor the(More)
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