This image of a simple structural formula is ineligible for copyright and therefore in the public domain, because it consists entirely of information that is common property and contains no original authorship.
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{{Information |Description={{en|Structure of HHTDD}} |Source={{Own}} i drew this anyone can use it |Date={{subst:CURRENTYEAR}}-{{subst:CURRENTMONTH}}-{{subst:CURRENTDAY}} |Author=Meodipt |Permission={{PD-chem}} |Other_versions= }}
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