The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 1979
Filed:
Dec. 06, 1977
Applicant:
Inventors:
Assignee:
May & Baker Limited, Essex, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ; C07G / ;
U.S. Cl.
CPC ...
424180 ; 536 / ;
Abstract
The spiramycin derivatives of the formula: ##STR1## wherein R.sup.1 represents acetyl, propionyl or hydrogen, A represents butenylene or butadienylene (wherein any double bonds present in A are trans), and R.sup.2 represents a group of the formula: ##STR2## wherein Z represents bivalent saturated or unsaturated alkylene of 1 to 6 carbon atoms, Y represents sulphur or oxygen, and R.sup.3 represents alkyl of 1 to 6 carbon atoms, cycloalkyl of 3 to 8 carbon atoms, aryl or aralkyl in which the alkylene moiety is of 1 to 6 carbon atoms and their non-toxic salts possess therapeutic and growth-promoting activity.