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The aromatic rings may be carbocyclic (benzene, naphthalene) or heterocyclic (Gürses et al., 2016). Azo dyes can also be categorized by the number of azo bonds in the dye molecule: monoazo, disazo, trisazo, polyazo, or azoic (Ramos-Souza et al., 2022; Zafar et al., 2022). The ...
To facilitate a systematic understanding of the alkaloids, the species–metabolite relation database (KNApSAcK Core DB [3]) has been established. To date, KNApSAcK Core DB includes 12,243 alkaloid compounds [4–6]. Alkaloids can be classified according to the starting substances of their ...
For instance, thiazoles are heterocyclic compounds containing a five-member aromatic ring made up of one sulfur atom, one nitrogen, and three carbon atoms. This category of compounds can be described with the following SMARTS expression: [Math Processing Error][$([#16]−1−[#6]=[#6]...
Alkaloids have extremely divergent chem- ical structures including heterocyclic ring systems and they encompass more than 20,000 different molecules in organisms [2]. To facilitate a systematic understanding of the alkaloids, the species–metabolite relation database (KNApSAcK Core DB [3]) has been ...
3.1.4. Linear Azole-Containing Peptides (LAPs) The linear azole-containing peptides (LAPs) are heterocyclic peptides derived from the threonine, cysteine, and serine of a short precursor peptide [68]. They consist of four obligatory modules: a precursor peptide that is also known as peptide ...