This invention encompasses prostaglandins of the formula ##STR1## wherein R represents hydrogen or lower alkyl having 1 to 6 carbon atoms; R.sub.1 represents hydrogen, vinyl, or lower alkyl having 1 to 4 carbon atoms and the wavy line represents R or S stereochemistry; R.sub.2, R.sub.3, and R.sub.4 are hydrogen or lower alkyl having 1 to 4 carbon atoms or R.sub.2 and R.sub.3 together with carbon Y form a cycloalkenyl having 4 to 6 carbon atoms or R.sub.3 and R.sub.4 together with carbons X and Y form a cycloalkenyl having 4 to 6 carbons. Compounds of this invention have potent gastric antisecretory and cytoprotective properties with unexpectedly lower diarrheogenic side effects.
这项发明涵盖了以下结构的
前列腺素:其中R代表氢或具有1至6个碳原子的较低烷基;R.sub.1代表氢、
乙烯或具有1至4个碳原子的较低烷基,波浪线代表R或S立体
化学;R.sub.2、R.sub.3和R.sub.4为氢或具有1至4个碳原子的较低烷基,或者R.sub.2和R.sub.3与碳原子Y一起形成具有4至6个碳原子的环烯烃,或者R.sub.3和R.sub.4与碳原子X和Y一起形成具有4至6个碳原子的环烯烃。这项发明的化合物具有强效的胃抗分泌和细胞保护性能,且出乎意料地具有较低的腹泻副作用。