letrozole
										 Stable isotopes
  - Letrozole is also used to help prevent the cancer from returning.  Some breast cancers are made to grow faster by a natural hormone called estrogen.  It is sold under the brand name Femara. Reference standards of Letrozole API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.
					
																		
			stdClass Object
(
    [pname] => Letrozole-d4 (major)
    [catalogue_number] => PA STI 056360
    [category_ids] => ,81,98,78,70,82,
    [chemical_name] => 
    [weight] => 289.33
    [form] => C17H7D4N5
    [cas] => 1133712-96-5
    [pslug] => 1133712-96-5-letrozole-d4-major-pasti056360
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										- Catalogue No.:PA STI 056360 
- Molecular Formula : C17H7D4N5 
- Molecular Weight : 289.33