The invention relates to compounds for use in medicine. The compounds are of general formula (I) as disclosed herein and the pharmaceutically acceptable salts, individual isomers and mixtures of isomers thereof, wherein X, X′ and X″ are independently O or S Z is N or P R3 is optional and is selected from the group consisting of optionally substituted C1-8 alkyl, optionally substituted C2-6alkenyl, optionally substituted C2-6 alkynyl, optionally substituted C1-6 alkoxy, optionally substituted C1-6 thioalkyl, optionally substituted C5-10 aryl, optionally substituted C6-11 alkylaryl, optionally substituted C1-6 alkylamino, optionally substituted C1-6 alkylcarbonyl, optionally substituted C1-6 alkylsulfonamino, optionally substituted (C1-C6)alkylsulfinyl, optionally substituted C1-6 alkylcarbonylamino, optionally substituted hetero(C4-C10)aryl, hydroxyl, halogen, cyano, nitro, amino, formyl, and thiol R1, R2, R4, R5, R6, R7, R8, R9, and R10 are independently selected from the group consisting of hydrogen, optionally substituted C1-8 alkyl, optionally substituted C2-6 alkenyl, optionally substituted C2-6 alkynyl, optionally substituted C1-6 alkoxy, optionally substituted C1-6 thioalkyl, optionally substituted C5-10 aryl, optionally substituted C6-11 alkylaryl, optionally substituted C1-6 alkylamino, optionally substituted C1-6 alkylcarbonyl, optionally substituted C1-6 alkylsulfonamino, optionally substituted (C1-C6)alkylsulfinyl, optionally substituted C1-6 alkylcarbonylamino, optionally substituted hetero(C4-C10)aryl, hydroxyl, halogen, cyano, nitro, amino, formyl, and thiol and - - - indicates an optional double bond.
