Spiro[4H-3,1-benzoxazine-4,7'(6'H)-pyrrolo[1,2-a]pyrazine]-1',2,4'(1H)-trione, 6'-(1,3-benzodioxol-5-yl)-2',3',8',8'a-tetrahydro-2'-methyl-, (8'aR)- [ 2747958-44-5 ]