58569-78-1 6H-Furo[2',3':4,5]oxazolo[3,2-a]pyrimidine, undecanoic acid deriv. NSC281722 Undecanoic acid, [2,3,3a,9a-tetrahydro-6-imino-3-[(1-oxoundecyl)oxy]-6H-furo[2',3':4,5]oxazolo[3,2-a]pyrimidin-2-yl]methyl ester, monohydrochloride, (2R-(2a,3.beta.,3a.beta.,9a.beta.))-