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Structure-Activity Relationships and Drug Design01:28

Structure-Activity Relationships and Drug Design

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Drug design is a dynamic field that involves discovering and developing new medications based on specific biological targets. This process heavily relies on structure-activity relationships (SAR) and quantitative structure-activity relationships (QSAR) to guide the design and optimization of efficient drugs.
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Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
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Adrenergic agonists' structure-activity relationship (SAR) determines their selectivity and efficacy. These agonists comprise a phenylethylamine moiety with an aromatic ring and an ethylamine side chain.
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Separation of...
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Polymer Classification: Stereospecificity01:26

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Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
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Prochirality02:05

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The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
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Rosanoid diterpenoids: structural diversity, classification and biological activities.

Sabrin R M Ibrahim1,2, Hani Z Asfour3, Gamal A Mohamed4

  • 1Preparatory Year Program, Department of Chemistry, Batterjee Medical College, Jeddah 21442, Saudi Arabia.

ADMET & DMPK
|March 19, 2026
PubMed
Summary

Rosanoid diterpenoids are unique natural compounds with diverse biological activities. This review covers their occurrence, structure, and bioactivity from 1975 to 2025, highlighting their potential in drug discovery.

Keywords:
Euphorbiaceaedrug discoveryent-rosane diterpenoidsnatural productsrosane diterpenoidsustainable development

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Area of Science:

  • Natural Product Chemistry
  • Medicinal Chemistry
  • Organic Chemistry

Background:

  • Rosanoid diterpenoids possess a unique tricyclic carbon skeleton.
  • They represent a bioactive subclass of diterpenes.

Purpose of the Study:

  • To comprehensively review rosanoid diterpenoids.
  • To cover their occurrence, structural diversity, and biological activities from 1975 to September 2025.

Main Methods:

  • Extensive literature search conducted across major scientific databases and publisher webpages.
  • Literature review covered reports from 1975 to September 2025.

Main Results:

  • Rosanoid diterpenoids isolated from fungi, liverworts, and plant families (e.g., Euphorbiaceae).
  • Predominant occurrence in Euphorbia species, indicating chemotaxonomic relevance.
  • Exhibited broad biological activities: anti-inflammatory, antimicrobial, antiviral, cytotoxic, enzyme-inhibitory, neuroactive, and anti-adipogenic.

Conclusions:

  • Rosanoid diterpenoids show significant chemical variability and pharmacological potential.
  • They are promising candidates for drug discovery and natural product development.
  • Further research needed on pharmacokinetics, mechanisms, safety, and biosynthesis.