Biogenesis of nicotine

Radioactive nicotine was synthesized by Nicotiana rustica L. which was fed sodium acetate-1-C(14), sodium acetate-2-C(14), sodium pyruvate-1-C(14), or sodium pyruvate-3-C(14). Acetate-2-C(14) and pyruvate-3-C(14) were converted to nicotine with the least dilution of radioisotope, whereas pyruvate-1-C(14) was incorporated with a relatively large dilution. When acetate-1-C(14) was administered to the plants the nicotine contained C(14) only in the pyrrolidine ring. After acetate-2-C(14) was fed, C(14) was located in both the pyrrolidine and pyridine rings.

Analgesic activity of (+)-1-(3-methyl-4-morpholino-2:2-diphenylbutyryl)pyrrolidine (r.875) in student volunteers

(+)-1-(3-Methyl-4-morpholino-2:2-diphenylbutyryl)pyrrolidine (R.875) raised the threshold to ischaemic pain in healthy human volunteers. The peak effect for all doses was reached after about 2 hr. The drug frequently caused nausea and vomiting but no euphoria. Muscular weakness was experienced by many subjects and was sometimes followed 1 to 2 hr. later by hiccup and muscle twitching, suggesting that R.875 may have an effect on striped muscle.