Patent US4115545 - Pharmaceutical composition containing prostadienoic acid for regulating ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsNovel alkyl diethers of prostaglandins of the formula; ##STR1## wherein R1 is hydrogen or lower alkyl; R2 and R6 are hydrogen when Y is a single bond and R2 and R6 are absent when Y is a double bon