Steroids, Heterocyclic. Heterocyclic Steroids . Steroidal compounds in which one or more carbon atoms in the steroid ring system have been substituted with non-carbon atoms. . 1.00
Acids, Heterocyclic. Heterocyclic Acids . A class of acids containing a ring structure in which at least one atom other than CARBON is incorporated. . 0.71
Steroids. Catatoxic Steroids . Steroids, Catatoxic . A group of polycyclic compounds closely related biochemically to TERPENES. They include cholesterol, numerous hormones, precursors of certain vitamins, bile acids, alcohols (STEROLS), and certain natural drugs and poisons. Steroids have a common nucleus, a fused, reduced 17-carbon atom ring system, cyclopentanoperhydrophenanthrene. Most steroids also have two methyl groups and an aliphatic side-chain attached to the nucleus. (From Hawley's Condensed Chemical Dictionary, 11th ed) . 0.66
