Synonyms: Heteratisan-14-one,20-ethyl-1,8-dihydroxy-4-methyl-, (1a)-; Heterophylline (Aconitum) (8CI);8H-13,3,6a-Ethanylylidene-7,10-methanooxepino[3,4-i]-1-benzazocin-8-one,1-ethyltetradecahydro-6,12a-dihydroxy-3-methyl-, [3R-(3a,6b,6aa,7b,7aa,10b,12aa,13a,13ab,15R*)]-; Heterophylline