2,5-diphenyl-6H-[1,3]oxazolo[5,4-d]pyrimidin-7-one

2-phenyloxazolo[5,4-d]pyrimidin-7(6H)-one

2-phenyl-5-pyridin-2-yl-6H-[1,3]oxazolo[5,4-d]pyrimidin-7-one

5-(dimethylamino)-2-phenyl-6H-[1,3]oxazolo[5,4-d]pyrimidin-7-one

5-methoxy-2-phenyl-6H-[1,3]oxazolo[5,4-d]pyrimidin-7-one