Q.Answer in one sentence :
Draw the structure of BHT.

Step 1. Recall the name. Section 16.1.2.5 names BHT as 3,5-di-tert-butyl-4-hydroxytoluene -- the name itself specifies every substituent and its ring position.

Step 2. Build the structure from the name. Starting from toluene (a benzene ring with a -CH3 group, taken as position 1), 'di-tert-butyl' at 3 and 5 places a -C(CH3)3 group on each of those two ring carbons, and '4-hydroxy' places a -OH group at position 4 -- directly across the ring from the methyl group, flanked symmetrically by the two tert-butyl g …

Deriving BHT's structure directly from its systematic IUPAC-styl …

• Placing the two tert-butyl groups on the same side / adjacent to each other rather than symmetrically flanking the -OH at positions …