A method of removing SO2 from a gas stream containing the same by absorbing the SO2 in an aqueous solution containing a 4 2 piperazinone compound or an alkyl or {HEAD ~ aryl} substituted {TAIL ~ derivative} thereof 
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A method of removing SO2 from a gas stream containing the same by absorbing the SO2 in an aqueous solution containing a 4 2 piperazinone compound or an alkyl or { HEAD ~ aryl } substituted { TAIL ~ derivative } thereof
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