Biochemistry of drugs XXIII. Substance with antineoplastic acitivity LX. Pharmacokinetics of cis-beta-4-pentoxybenzoyl-beta-bromoacrylic acid (cis: Br, H)-3H (Penberol-3H).

After oral administration of Penberol-3H to mice with mammary gland adenocarcinoma HK, within 4 days 50% of the administered radioactivity was excreted in the urine, and 36% in the faeces. In dogs the excretion rates were slower. It was found that after oral administration of Penberol-3H to rats, radioactivity was excreted in the bile. After oral administration of Penberol-3H to mice with mammary gland adenocarcinoma, high specific radioactivities (per gram of tissue) were found in the liver, kidneys, lungs, and ovaries. Besides, it was found that after oral administration of Penberol-3H to nursing female rats the radioactivity was little eliminated in the milk, and in pregnant females its penetration into the fetuses was negligible.