First hydrogen-bonded adduct of sterically hindered 2-<i>tert</i>-butyl-4-methylphenol (TBMP) with 1,3,6,8-tetraazatricyclo[4.4.1.1<sup>3,8</sup>]dodecane (TATD) <i>via</i> coupling of classical hydrogen bonds and C—H...π non-covalent interactions
Acta crystallographica. Section E, Crystallographic communications