3,4,4a,10b-tetrahydro-4-propyl-2H,5H-(1)benzopyrano(4,3-b)-1,4-oxazin-9-ol [ 3,4,4a,10b-tetrahydro-4-propyl-2H,5H-(1)benzopyrano(4,3-b)-1,4-oxazin-9-ol, (+)-isomer,3,4,4a,10b-tetrahydro-4-propyl-2H,5H-(1)benzopyrano(4,3-b)-1,4-oxazin-9-ol, (-)-isomer,PBPO,PBTO,PD 128907,PD-128907,PD128907 ] RN given refers to (+/-)-isomer; RN, RRs & structure given in first source