Carbocyclic nucleosides 6 Conformationally locked nucleosides 6 Ampullariella regularis 4 Neplanocin B 4 6-oxabicyclo[3.1.0]hexane 3 2 amino 9 [4 hydroxy 5 (hydroxymethyl) 6 oxabicyclo[3.1.0]hex 2 yl]hydropurin 6 one 2 2′-deoxyneplanocin C 2 4 (6 aminopurin 9 yl) 1 (hydroxymethyl) 6 oxabicyclo[3.1.0]hexan 2 ol 2 6-oxobicyclo[3.1.0]hexane 2 8 hydroxy 7 (phenylmethoxy) 8 [(phenylmethoxy)methyl] 5,6,7,8,5a,8a hexahydro 5ah,8ah cyclopenta[1,2 d]pyrimidino[2,1 b] 1,3 oxazolidin 2 one 2 Antiviral activity, EBV 2 Epstein Barr virus 2 Mitsunobu reaction 2 antibiotic agent 2 antiviral activity 2 article 2 bicyclo compound 2 carbocyclic nucleoside 2 deoxyguanosine derivative 2 drug conformation 2 drug synthesis 2 heterocyclic compound 2 neplanocin c 2 oxabicyclo[3.1.0]hexane 2 priority journal 2 purine derivative 2 rotation 2 unclassified drug 2 6-oxabicyclo[3.1.0]hexane 1