118236-14-9

2,3-dihydro-5H-oxazolothienopyrimidin-5-one 5H-Oxazolo[3,2-a]thieno[2,3-d]pyrimidin-5-one, 2,3-dihydro- 10-oxa-6-thia-1,8-diazatricyclo[7.3.0.0^{3,7}]dodeca-3(7),4,8-trien-2-one