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:
Jun. 27, 2017
Filed:
Apr. 11, 2012
Applicants:
Suizhen Lin, Guangzhou, CN;
Jingxia Zhang, Guangzhou, CN;
Xinhua LI, Guangzhou, CN;
Inventors:
Assignee:
GUANGZHOU CELLPROTEK PHARMACEUTICAL CO., LTD., Guangzhou, CN;
Primary Examiner:
Int. Cl.
CPC ...
C07J 1/00 (2006.01);
U.S. Cl.
CPC ...
C07J 1/0007 (2013.01); C07B 2200/13 (2013.01);
Abstract
The present invention relates to four crystalline forms (crystalline forms A, B, C and D) of 5α-androstane-3β,5,6β-triol (YC-6) and preparation methods therefor. The four crystalline forms have significant difference in their lattice parameters, 2θ values and intensity in X-ray power diffraction, and melting points, etc. The study on its polymorphism is very important for further studying its effect, bioavailability and stability.