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by
  • Hui Lu,
  • Xia Zhou* and
  • Lei Wang
  • et al.

Reviewer 1: Anonymous Reviewer 2: Anonymous

Round 1

Reviewer 1 Report

The manuscript is accepted as it is 

Reviewer 2 Report

The AA have now described in a more detailed and chemically clear manner the chemical procedure for the synthesis of their compounds.

Two observations:

-- the sentence “Among them, it was unexpectedly found that compounds A4, A7, A11, A12 have been reported” il rather surprising! Was does “unexpectedly” means? Maybe a more careful literature search should have been done from the very beginning! Anyway, the AA should report, in the experimental section, at least the physico-chemical data (melting point…) already reported for the known compounds, so as to confirm their own experimental data.

-- the English language is still very poor and I herein restate that an extensive editing (or a complete check by an English speaking person) should be done before publication.