*The following content is generated by AI and is for reference only.
<h3>Overview</h3>
<p>Entecavir Intermediate (ETC) is a critical pharmaceutical building block for synthesizing <strong>Entecavir</strong>, a potent antiviral agent. The core process involves <strong>cyclization</strong> and <strong>substitution</strong> reactions to construct the bicyclic nucleoside scaffold. Molecular formula: C<sub>10</sub>H<sub>15</sub>N<sub>5</sub>O<sub>4</sub>; CAS No.: 189782-66-1.</p>
<h3>Application</h3>
<ul>
<li><strong>Pharmaceutical Manufacturing</strong>: Primary raw material for producing generic Entecavir tablets targeting chronic Hepatitis B virus infection.</li>
<li><strong>R&D Laboratories</strong>: Used in stability studies and formulation development for new antiviral drug candidates.</li>
<li><strong>Contract Manufacturing</strong>: Supplied by API manufacturers to global pharma companies for bulk drug substance production.</li>
</ul>
<h3>Precautions</h3>
<p>Strictly store in a cool, dry place away from light to prevent degradation. Handle with appropriate PPE due to potential irritancy. Not intended for direct clinical administration; only for industrial synthesis of approved drugs.</p>