trans-iso-Terbinafine Hydrochloride ; N-[(2E)-6,6-Dimethyl-2-hepten-4-yn-1-yl]-N-methyl-2-naphthalenemethanamine Hydrochloride ; Terbinafine HCl Impurity C ; USP Terbinafine Related Compound C ; Terbinafine EP Impurity C ; Terbinafine BP Impurity C ; Terbinafine USP Related Compound C