4.6 Article

Ultrasound-Assisted Expedient and Green Synthesis of a New Series of Diversely Functionalized 7-Aryl/heteroarylchromeno[4,3-d]pyrido[1,2-a]pyrimidin-6(7H)-ones via One-Pot Multicomponent Reaction under Sulfamic Acid Catalysis at Ambient Conditions

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