Activity of bis-carbamoyloxymethyl derivatives of pyrroles and pyrrolizines against human tumor xenografts in nude mice

The activities of the pyrrolizines Compounds I and II, and the pyrroles, Compounds IV and V, are reported in nude mouse-grown HT-29 human adenocarcinoma of the colon, DO 1 human oat carcinoma of the lung, and CL 1 human duct cell carcinoma of the breast (coded as CX-1, LX-1, and MX-1, respectively, by the National Cancer Institute). Compounds II and IV were active against all three experimental tumors; both compounds produced significant tumor regression in the human breast tumor xenograft and Compound IV caused tumor regression in the human lung tumor xenograft.