... 1,2-f)(1,3)benzodioxole,5,6,7,8-tetrahydro-1,2,3,13-tetram; or 5,6,7,8-Tetrahydro-1,2,3,13-tetramethoxy-6,7 ... -dimethyl-, stereoisomer Benzo [3,4] cycloocta [1 ... ,2-f][1 ... the main constituents being: 1. Schisandrin (Schisandrin B, Gomisin ...