Compound of formula: in which - n is an integer equal to 0 or 1, - R1 represents ∘ when n=0, an alkyl chain of 3 to 6 preferably linear carbon atoms, an alkenyl or alkylene chain, a linear hydroxyalkyl chain of 2 to 6 carbon atoms, wherein the hydroxyl function is optionally protected or the oxygen of this function is substituted in order to form a leaving group, a haloalkyl chain, wherein the halogen is radioactive or not and of 2 to 6 carbon atoms, or a fluoromethyl group, wherein the fluorine is radioactive or not ∘ when n=1, a monohydroxyalkyl chain of 1 to 6 carbon atoms, wherein the hydroxyl function, in the terminal position, is optionally protected or the oxygen of this function is substituted in order to form a leaving group, or monohaloalkyl, wherein the halogen, in the terminal position, is radioactive or not and of 1 to 6 carbon atoms, wherein the halogen is different from bromine - P 1 represents ∘ when n=0: respectively a hydrogen atom or respectively an identical protective group of the hydroxyl function ∘ when n=1 and R1 is a monohydroxyalkyl chain: respectively a hydrogen atom or respectively an identical protective group of the hydroxyl function, ∘ when n=1 and R1 is a monohaloalkyl chain: respectively a hydrogen atom or respectively an identical protective group of the hydroxyl function - Y 1 represents: ∘ when n=0, a OP 1 group, wherein P 1 is as defined above, or, ∘ when n=1, a hydrogen atom, with the exception of non-radiolabeled 2-fluoromethyl-myo-inositols compounds for which an identical or different P 1 represents a hydrogen atom or a benzyl protecting group. - n is an integer equal to 0 or 1, - R1 represents ∘ when n=0, an alkyl chain of 3 to 6 preferably linear carbon atoms, an alkenyl or alkylene chain, a linear hydroxyalkyl chain of 2 to 6 carbon atoms, wherein the hydroxyl function is optionally protected or the oxygen of this function is substituted in order to form a leaving group, a haloalkyl chain, wherein the halogen is radioactive or not and of 2 to 6 carbon atoms, or a fluoromethyl group, wherein the fluorine is radioactive or not ∘ when n=1, a monohydroxyalkyl chain of 1 to 6 carbon atoms, wherein the hydroxyl function, in the terminal position, is optionally protected or the oxygen of this function is substituted in order to form a leaving group, or monohaloalkyl, wherein the halogen, in the terminal position, is radioactive or not and of 1 to 6 carbon atoms, wherein the halogen is different from bromine ∘ when n=0, an alkyl chain of 3 to 6 preferably linear carbon atoms, an alkenyl or alkylene chain, a linear hydroxyalkyl chain of 2 to 6 carbon atoms, wherein the hydroxyl function is optionally protected or the oxygen of this function is substituted in order to form a leaving group, a haloalkyl chain, wherein the halogen is radioactive or not and of 2 to 6 carbon atoms, or a fluoromethyl group, wherein the fluorine is radioactive or not ∘ when n=1, a monohydroxyalkyl chain of 1 to 6 carbon atoms, wherein the hydroxyl function, in the terminal position, is optionally protected or the oxygen of this function is substituted in order to form a leaving group, or monohaloalkyl, wherein the halogen, in the terminal position, is radioactive or not and of 1 to 6 carbon atoms, wherein the halogen is different from bromine - P 1 represents ∘ when n=0: respectively a hydrogen atom or respectively an identical protective group of the hydroxyl function ∘ when n=1 and R1 is a monohydroxyalkyl chain: respectively a hydrogen atom or respectively an identical protective group of the hydroxyl function, ∘ when n=1 and R1 is a monohaloalkyl chain: respectively a hydrogen atom or respectively an identical protective group of the hydroxyl function ∘ when n=0: respectively a hydrogen atom or respectively an identical protective group of the hydroxyl function ∘ when n=1 and R1 is a monohydroxyalkyl chain: respectively a hydrogen atom or respectively an identical protective group of the hydroxyl function, ∘ when n=1 and R1 is a monohaloalkyl chain: respectively a hydrogen atom or respectively an identical protective group of the hydroxyl function - Y 1 represents: ∘ when n=0, a OP 1 group, wherein P 1 is as defined above, or, ∘ when n=1, a hydrogen atom, ∘ when n=0, a OP 1 group, wherein P 1 is as defined above, or, ∘ when n=1, a hydrogen atom,