Section 39-17-416 - Controlled substances in Schedule VII(a) There is established a Schedule VII for the classification of substances that should not be included in Schedules I through VI.(b) The controlled substance included in Schedule VII is Butyl nitrite and any isomer of Butyl nitrite.Acts 1989, ch. 591, § 1; 1990, ch. 1044, § 1; 1992, ch. 700, §§ 1, 2.