2-guanidino-4-(4-phthalimidobutyl)imidazole 、 sodium hydroxide 、 盐酸 以
water ethanol 为溶剂,
反应 1.0h,
以to give a pH of 12的产率得到2-guanidino-4-(4-aminobutyl)imidazole
Enhanced antiulcer activity is obtained in warm-blooded animals by the concomitant administration of the pepsin complexing agent, pepstatin, and an histamine H2-receptor antagonist of the formula
wherein A, m, Z, n, p and R1 are as defined herein. Concomitant administration of the two entities reduces the amount of histamine H2-receptor antagonist necessary for treatment, thereby decreasing its side-effect liability.