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Structure of 42831-50-5
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5-Methylisoxazole-4-carboxylic acid features a fused heterocyclic core with complementary electron-withdrawing and donor substituents, enabling robust integration into bioactive scaffolds. The carboxylic acid group facilitates direct coupling in peptide and macrocyclic synthesis, while the methylated isoxazole ring enhances metabolic stability and lipophilic character. This compound serves as a key building block for pharmaceutical intermediates requiring precise electronic tuning and solubility balance.
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GHS Pictogram :
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GHS No : GHS07
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Signal Word : Warning
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UN#: N/A
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Class : N/A
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Packing Group : N/A
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Hazard Statements : H302-H315-H319-H335
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Precautionary Statements : P261-P264-P270-P271-P280-P302+P352-P304+P340-P305+P351+P338-P330-P362+P364-P403+P233-P405-P501
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Lot numbers can be found on the outside label of a product: