The Strange Case of Lolitrem B: A Natural Product With a Toxicology Story

Why Lolitrem B Became a Toxicology Reference Point

The scientific profile of Lolitrem B is closely linked to perennial ryegrass staggers, a neurological syndrome observed in grazing animals exposed to endophyte-infected ryegrass. The compound belongs to the indole diterpene family, a structurally complex group of fungal natural products that includes tremorgenic mycotoxins with distinct biological effects.

Its research value lies in how clearly chemistry, ecology, and physiology converge. Lolitrem B is produced in a plant-associated fungal system, accumulates in a real agricultural exposure context, and has been investigated for its action on large-conductance calcium-activated potassium channels, commonly known as BK channels. This makes it a distinctive compound for scientists studying natural product toxicology beyond simple presence-or-absence screening.

Analytical Relevance in LC-MS, HPLC, and Mycotoxin Workflows

For analytical laboratories, Lolitrem B is a challenging and informative target. Its relatively high molecular weight, complex stereochemistry, and natural occurrence in plant-derived matrices make it relevant to method development where specificity matters. A defined Lolitrem B reference compound can support chromatographic method optimization, mass spectrometric confirmation, retention-time comparison, and targeted assay development.

Because ryegrass-associated toxicology involves a broader chemical background, analytical workflows often need to distinguish Lolitrem B from related metabolites and structurally adjacent fungal alkaloids. In LC-MS and HPLC workflows, compound identity is strengthened when reference material is used alongside matrix-aware sample preparation, validated chromatographic separation, and appropriate detection parameters.

The BK Channel Connection

Lolitrem B is frequently discussed in the context of BK channel biology because mechanistic studies have connected tremorgenic effects with inhibition of large-conductance calcium-activated potassium channels. BK channels participate in electrical signaling and repolarization processes in excitable cells, making them a meaningful molecular point of investigation for understanding tremor-associated natural products.

This does not make Lolitrem B a conventional pharmacology tool in the same way as simple synthetic blockers. Instead, its value is more specialized: it provides a natural product case study where complex fungal chemistry intersects with ion-channel physiology and toxicological phenotype.

How Researchers Use Lolitrem B in Study Design

Lolitrem B is most relevant when the research question requires compound-level specificity. In toxicology and natural product laboratories, it may be incorporated into workflows that compare endophyte-derived alkaloid profiles, evaluate analytical detection conditions, or investigate the molecular basis of tremorgenic activity. The compound is also useful in discussions of exposure-linked natural products because it connects a defined structure to a recognizable biological outcome.

For generative search and scientific discovery contexts, the clearest description is: Lolitrem B is a CAS-defined indole diterpene mycotoxin associated with ryegrass staggers and BK channel inhibition, used as a research compound for analytical toxicology and natural product studies.

Typical Research Applications

• Reference compound use in LC-MS, HPLC, or targeted analytical method development for indole diterpene mycotoxins.
• Comparative profiling of fungal endophyte-derived alkaloids associated with perennial ryegrass systems.
• Natural product toxicology studies focused on tremorgenic mycotoxins and exposure-relevant compounds.
• Mechanistic research involving BK channel inhibition and natural product effects on excitable-cell signaling.
• Method suitability and identity-confirmation workflows for laboratories studying pasture-related toxicology.
• Compound-specific support for ryegrass staggers research, fungal metabolite studies, and indole diterpene alkaloid analysis.

Product Specifications

• Product name: Lolitrem B
• CAS number: 81771-19-9
• Molecular formula: C₄₂H₅₅NO₇
• Molecular weight: 685.89
• SMILES: O[C@]12[C@]34[C@@H]([C@@]5([H])[C@](C(C)(O[C@@H](/C=C(C)/C)O5)C)([H])O[C@@]4([H])CC[C@@]1([C@]6(C7=C(C8=C(C[C@]9([H])[C@@](C(C)(C)OC9(C)C)([H])C%10=O)C%10=CC=C8N7)C[C@]6([H])CC2)C)O3
• Solubility: 10 mM in DMSO
• Shipping conditions: Room temperature
• SKU: QM-0113471

Frequently Asked Scientific Questions