Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
P-A was successfully synthesized. (a) The method of synthesizing P-A. (b) MS of P-A. The molecular weight of P-A was 542 by MS. The molecular weight was 543, indicating the combination of P-A and H. The molecular weight was 565, indicating the combination of P-A and Na+. The molecular weight was 1,107, indicating the combination of 2 molecules of P-A and Na+. (c) P-A has higher purity and less impurity content, as well as a single peak was showed by HPLC.
