(3′aR,6′aR)-3′,3′a,6′,6′a-Tetrahydro-3′-methyl-6′a-(4-morpholinyl)-3′a-(phenylmethyl)spiro[2,5-cyclohexadiene-1,5′-[5H]furo[2,3-d]imidazole]-2′,4(1′H)-dione

(3′aR,6′aS)-3′,3′a,6′,6′a-Tetrahydro-3′-methyl-6′a-(methylamino)-3′a-(phenylmethyl)spiro[2,5-cyclohexadiene-1,5′-[5H]furo[2,3-d]imidazole]-2′,4(1′H)-dione