The invention relates to a novel nine step process for synthesizing PQQ (methoxatin). This process is efficient and reliably provides PQQ in excellent purity and high yield.
CRYSTALLINE FORMS OF PYRROLOQUINOLINE QUINONE DISODIUM SALT
申请人:ZHUCHENG HAOTIAN PHARM CO., LTD.
公开号:US20150291583A1
公开(公告)日:2015-10-15
The present invention relates to crystalline forms of pyrroloquinoline quinone disodium salt. The present invention provides crystalline Form A and crystalline Form B of pyrroloquinoline quinone disodium salt, and the methods and uses for the preparation thereof. The X-ray powder diffraction patterns of crystalline Form A and crystalline Form B are as shown by FIG.
1
and FIG.
5
, respectively. The crystalline forms of the present invention have low moisture absorption and high stability, as well as excellent use and storage performances.