There did not appear to be a definite trend with respect to the number of ethylene oxide units separating the tin atoms.
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The sentences
There does not appear to be a strong trend with respect to the electron density on the hydroquinone.
There did not appear to be a definite trend with respect to the number of ethylene oxide units separating the tin atoms.
There does not appear to be a strong trend with respect to the electron density on the hydroquinone.