A compound represented by Formula V, XVIII, X or XIII: or its geometric isomers, enantiomers, diastereomers, racemates, pharmaceutically acceptable salts and solvates thereof, wherein ------------ represents a single or double bond; w is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11. R 5 is selected from -CH(R 10)C OR 20, -CH(R 10)-C R 20, -CH(R 10)-OC NR 20 R 21, -(CH(R 10))-OPO 3 MY, -(CH(R 10))-OP (OR 20)(OR 21), and wherein z is 1, 2, 3, 4, 5, 6, or 7; each R 20 and R 21 is independently selected from hydrogen, aliphatic, substituted aliphatic, aryl or substituted aryl; Y and M are the same or different and each is a monovalent cation; or M and Y together is a divalent cation; each x and y is independently an integer between 0 and 30, wherein R 100, R 101 and R 103 are independently selected from hydrogen, halogen, optionally substituted C 1 -C 8 alkyl, optionally substituted C 2 -C 8 alkenyl, optionally substituted C 2 -C 8 alkynyl, optionally substituted C 3 -C 8 cycloalkyl, optionally substituted C 1 -C 8 alkoxy, optionally substituted C 1 -C 8 alkylamino and optionally substituted C 1 -C 8 aryl; R 105, R 106 and R 107 are independently selected from hydrogen, halogen, optionally substituted C 1 -C 24 alkyl, optionally substituted C 2 -C 24 alkenyl, optionally substituted C 2 -C 24 alkynyl, optionally substituted C 3 -C 24 cycloalkyl, optionally substituted C 1 -C 24 alkoxy, optionally substituted C 1 -C 24 alkylamino and optionally substituted C 1 -C 24 aryl; R 10 is hydrogen, halogen, aliphatic, substituted aliphatic, aryl or substituted aryl; and wherein "substituted" refers to the replacement of one or more hydrogen radicals in a given structure with the radical of a specified substituent selected from halo, alkyl, alkenyl, alkynyl, aryl, heterocyclyl, thiol, alkylthio, arylthio, alkylthioalkyl, arylthioalkyl, alkylsulfonyl, alkylsulfonylalkyl, arylsulfonylalkyl, alkoxy, aryloxy, aralkoxy, aminocarbonyl, alkylaminocarbonyl, arylaminocarbonyl, alkoxycarbonyl, aryloxycarbonyl, haloalkyl, amino, trifluoromethyl, cyano, nitro, alkylamino, arylamino, alkylaminoalkyl, arylaminoalkyl, aminoalkylamino, hydroxy, alkoxyalkyl, carboxyalkyl, alkoxycarbonylalkyl, aminocarbonylalkyl, acyl, aralkoxycarbonyl, carboxylic acid, sulfonic acid, sulfonyl, phosphonic acid, heteroaryl, heterocyclic, and aliphatic. wherein ------------ represents a single or double bond; w is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11. R 5 is selected from -CH(R 10)C OR 20, -CH(R 10)-C R 20, -CH(R 10)-OC NR 20 R 21, -(CH(R 10))-OPO 3 MY, -(CH(R 10))-OP (OR 20)(OR 21), and wherein z is 1, 2, 3, 4, 5, 6, or 7; each R 20 and R 21 is independently selected from hydrogen, aliphatic, substituted aliphatic, aryl or substituted aryl; Y and M are the same or different and each is a monovalent cation; or M and Y together is a divalent cation; each x and y is independently an integer between 0 and 30, wherein R 100, R 101 and R 103 are independently selected from hydrogen, halogen, optionally substituted C 1 -C 8 alkyl, optionally substituted C 2 -C 8 alkenyl, optionally substituted C 2 -C 8 alkynyl, optionally substituted C 3 -C 8 cycloalkyl, optionally substituted C 1 -C 8 alkoxy, optionally substituted C 1 -C 8 alkylamino and optionally substituted C 1 -C 8 aryl; R 105, R 106 and R 107 are independently selected from hydrogen, halogen, optionally substituted C 1 -C 24 alkyl, optionally substituted C 2 -C 24 alkenyl, optionally substituted C 2 -C 24 alkynyl, optionally substituted C 3 -C 24 cycloalkyl, optionally substituted C 1 -C 24 alkoxy, optionally substituted C 1 -C 24 alkylamino and optionally substituted C 1 -C 24 aryl; wherein z is 1, 2, 3, 4, 5, 6, or 7; each R 20 and R 21 is independently selected from hydrogen, aliphatic, substituted aliphatic, aryl or substituted aryl; Y and M are the same or different and each is a monovalent cation; or M and Y together is a divalent cation; each x and y is independently an integer between 0 and 30, wherein R 100, R 101 and R 103 are independently selected from hydrogen, halogen, optionally substituted C 1 -C 8 alkyl, optionally substituted C 2 -C 8 alkenyl, optionally substituted C 2 -C 8 alkynyl, optionally substituted C 3 -C 8 cycloalkyl, optionally substituted C 1 -C 8 alkoxy, optionally substituted C 1 -C 8 alkylamino and optionally substituted C 1 -C 8 aryl; R 105, R 106 and R 107 are independently selected from hydrogen, halogen, optionally substituted C 1 -C 24 alkyl, optionally substituted C 2 -C 24 alkenyl, optionally substituted C 2 -C 24 alkynyl, optionally substituted C 3 -C 24 cycloalkyl, optionally substituted C 1 -C 24 alkoxy, optionally substituted C 1 -C 24 alkylamino and optionally substituted C 1 -C 24 aryl; R 10 is hydrogen, halogen, aliphatic, substituted aliphatic, aryl or substituted aryl; and wherein "substituted" refers to the replacement of one or more hydrogen radicals in a given structure with the radical of a specified substituent selected from halo, alkyl, alkenyl, alkynyl, aryl, heterocyclyl, thiol, alkylthio, arylthio, alkylthioalkyl, arylthioalkyl, alkylsulfonyl, alkylsulfonylalkyl, arylsulfonylalkyl, alkoxy, aryloxy, aralkoxy, aminocarbonyl, alkylaminocarbonyl, arylaminocarbonyl, alkoxycarbonyl, aryloxycarbonyl, haloalkyl, amino, trifluoromethyl, cyano, nitro, alkylamino, arylamino, alkylaminoalkyl, arylaminoalkyl, aminoalkylamino, hydroxy, alkoxyalkyl, carboxyalkyl, alkoxycarbonylalkyl, aminocarbonylalkyl, acyl, aralkoxycarbonyl, carboxylic acid, sulfonic acid, sulfonyl, phosphonic acid, heteroaryl, heterocyclic, and aliphatic.