4H-Pyrano[4',3':4,5]thieno[2,3-d]pyrimidin-4-one, 3,5,6,8-tetrahydro-6,6-dimethyl-2-octyl-;6,6-Dimethyl-2-octyl-3,5,6,8-tetrahydro-4H-pyrano[4',3':4,5]thieno[2,3-d]pyrimidin-4-one
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