Abstract: The present invention relates to a new prostagrandine I analogous compounds represented by the following formula (I) and (II). ##STR1## wherein R.sub.1 is a hydrogen atom or alkyl group, at least one of R.sub.2 and/or R.sub.2 ' are a halogen atom, an alkyl group, a group containing an aromatic group, a hydroxyl group or an alkoxy group providing that the R.sub.2 and R.sub.2 ' are not simultaneously hydrogen atoms or salt thereof, which compound is expected as hypotensives.

Abstract: The present invention provides new compounds, 13,14-dihydro-15-keto-PGFs, and vassopressors containing them, which raise blood pressure without substantial ephemeral depression of blood pressure, trachea or enteron contraction effect inherent in usual PGFs.

Abstract: A method of disinfection for retroviruses which comprises contacting inanimate object in need of such treatment with a natural or synthetic oligo- or polysaccharide having at least one S-oxoacid group attached to the saccharic carbon atom through a linking group of low molecular weight.

Abstract: A method for treatment of a hepatobiliary disease which comprises administering, to a subject in need of such treatment, a 15-ketoprostaglandin compound in an amount effective in treatment of the hepatobiliary disease.

Abstract: Amethod for inducing decrease in potassium ion concentration in the blood which comprises administering, to a subject having an increased potassium ion concentration in the blood, a prostanoic acid derivative in an amount effective in inducing decrease in potassium ion concentration in the blood wherein said concentration is increased or for improving extracorporeal excretion of potassium ion in the blood which comprises administering, to a subject having an increased potassium ion concentration in the blood, a prostanoic acid derivative in an amount effective in improving extracorporeal excretion of potassium ion concentration is increased.

Abstract: The present invention provides novel prostaglandins D, that is, 13,14-dihydro-15-keto-PGDs, which have an excellent sedative and sleep-inducing activity, and so they are useful for tranquilizer and/or soporifics.

Abstract: A method for treatment of shock which comprises administering, to a subject in need of such treatment, a cyclodextrin or a derivative thereof in an amount effective in such treatment.

Abstract: The present invention provides an improved method of producing solid sorbitol which hardly cakes even in long storage, in which seed crystals are dispersed in melted sorbitol at a temperature that the melted sorbitol does not solidify but the seed crystals do not melt, and cooled to about 50.degree. to 85.degree. C., kept at said temperature for a given period and then cooled again.

Abstract: This invention provides a fervescence composition containing 15-keto-PHEs separated from any substantial activity such as decrease of blood pressure.

Abstract: The present invention relates to ocular hypotensive agents which contains 13,14-dihydro-15-keto-prostagrandins, which shows no transient ocular hypertensive response that PGs usually show.