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<a href=https://sildenafi.buzz>natural female viagra</a> The main reaction is the migration of the exocyclic double bond to form 3 3 hydroxy 4 methoxybenzyl chromone 650; a skeletal rearrangement through a ring opening reaction accounts for the formation of the other minor product, 3 hydroxy 4 methoxy 3 methylflavone 651
 
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