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BX795 [Supplementary Concept]
structure in first source
Date introduced: April 11, 2013
Thiophenes
A monocyclic heteroarene furan in which the oxygen atom is replaced by a sulfur.
Sulfur Compounds
Inorganic or organic compounds that contain sulfur as an integral part of the molecule.
Year introduced: 1998
Pyrimidines
A family of 6-membered heterocyclic compounds occurring in nature in a wide variety of forms. They include several nucleic acid constituents (CYTOSINE; THYMINE; and URACIL) and form the basic structure of the barbiturates.
Year introduced: THONZYLAMINE was heading 1972-1984 (Prov 1972)
Organic Chemicals
A broad class of substances containing carbon and its derivatives. Many of these chemicals will frequently contain hydrogen with or without oxygen, nitrogen, sulfur, phosphorus, and other elements. They exist in either carbon chain or carbon ring form.
Heterocyclic Compounds, 1-Ring
Organic compounds that contain a ring structure made up of carbon and one or more additional elements such as nitrogen and oxygen.
Heterocyclic Compounds
Cyclic compounds that include atoms other than carbon in their ring structure.