Structural Formula Identifyer Quiz

For the thumbnail for example you could be answered with C₆H₂(NO₂)₃CH₃ (chemical formula), C₇H₅N₃O₆ (sum of the involved atoms), 2,4,6-trinitrotoluene (IUPAC name), Trinitrotoluene (common name) or TNT (acronym).

When all atoms are labelled, you can't use the second options.