"PeerJ Preprints" is a venue for early communication or feedback before peer review. Data may be preliminary.

Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Zaid M Jaber Al-Obaidi conceived and designed the experiments, performed the experiments, prepared figures and/or tables, authored or reviewed drafts of the paper.

Omar F Abdul-Rasheed approved the final draft.

Monther F Mahdi contributed reagents/materials/analysis tools.

Ayad M R Raauf analyzed the data.

Data Deposition

The following information was supplied regarding data availability:






We, the authors, plan to submit the structures in this paper to the CCDC:


The authors received no funding for this work.

Add your feedback

Before adding feedback, consider if it can be asked as a question instead, and if so then use the Question tab. Pointing out typos is fine, but authors are encouraged to accept only substantially helpful feedback.

Some Markdown syntax is allowed: _italic_ **bold** ^superscript^ ~subscript~ %%blockquote%% [link text](link URL)
By posting this you agree to PeerJ's commenting policies
  Visitors   Views   Downloads