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https://www.sigmaaldrich.com/US/en/product/aldrich/122068 trans-4-Methoxy-3-buten-2-one technical grade, 90 51731-17-0 Aldrich-122068; trans-4-Methoxy-3-buten-2-one technical grade, 90%; CAS Number: 51731-17-0; Linear Formula: CH3OCH=CHCOCH3; find related products, papers,... 3 buten 2 one