This invention provides for a compound of formula (I):

##STR00001##

or a pharmaceutically acceptable salt thereof, wherein R1-R4, L and X are defined herein. The compounds of formula (I) and pharmaceutically acceptable salts thereof are cationic lipids useful in the delivery of biologically active agents to cells and tissues.

This invention provides for a compound of formula (I):

##STR00001##

or a pharmaceutically acceptable salt thereof, wherein R1-R4, L and X are defined herein. The compounds of formula (I) and pharmaceutically acceptable salts thereof are cationic lipids useful in the delivery of biologically active agents to cells and tissues.

The invention generally relates to adenylyl cyclase inhibitor compounds and methods for treating neuropathic or inflammatory pain by using those compounds.

The invention generally relates to adenylyl cyclase inhibitor compounds and methods for treating neuropathic or inflammatory pain by using those compounds.

The present disclosure generally relates to compounds useful as immunomodulators. Provided herein are compounds, compositions comprising such compounds, and methods of their use. The disclosure further pertains to pharmaceutical compositions comprising at least one compound according to the disclosure that are useful for the treatment of various diseases, including cancer and infectious diseases.

The present disclosure generally relates to compounds useful as immunomodulators. Provided herein are compounds, compositions comprising such compounds, and methods of their use. The disclosure further pertains to pharmaceutical compositions comprising at least one compound according to the disclosure that are useful for the treatment of various diseases, including cancer and infectious diseases.

The invention generally relates to adenylyl cyclase inhibitor compounds and methods for treating neuropathic or inflammatory pain by using those compounds.

The invention generally relates to adenylyl cyclase inhibitor compounds and methods for treating neuropathic or inflammatory pain by using those compounds.

New chelators such as H.sub.3L1, H.sub.3L2, H.sub.3L3, H.sub.3L26 and derivatives were synthesized for the complexation of {Al.sup.18F}.sup.2+. These new chelators are able to complex {AI.sup.18F}.sup.2+ with good radiochemical yields using a labeling temperature of 37 C. The stability of the new Al.sup.18F-complexes was tested in phosphate buffered saline (PBS) at pH 7 and in rat serum. AI.sup.18F-L3 and AI.sup.18F-L26 showed a stability comparable to that of the previously reported Al.sup.18F-NODA. Moreover, the biodistribution of Al.sup.18F-L3 and Al.sup.18F-L26 showed absence of in vivo demetallation since only very limited bone uptake was observed, whereas the major fraction of activity 60 min p.i. was observed in liver and intestine due to hepatobiliary clearance of the radiolabeled ligand. The chelators H.sub.3L3 and Al.sup.18F-L26 demonstrated to be a good lead candidates for the labeling of heat sensitive biomolecules with .sup.18F-fluorine and derivatives have been synthesized. We have explored the complexation of {AI.sup.18F}.sup.2+ with new chelators and obtained very favourable radiochemical yields (>85%) using a labeling temperature of 37 C. The stability of the new Al.sup.18F-complexes was tested in phosphate buffered saline (PBS) at pH 7 and in rat serum at 37 C., where AI.sup.18F-L3 and AI.sup.18F-L26 showed a stability comparable to that of the previously reported Al.sup.18F-NODA. Moreover, the biodistribution of Al.sup.18F-L3 and Al.sup.18F-L26 showed high stability, since only very limited bone uptakewhich would be an indication of release of fluorine-18 in the form of fluoridewas observed, whereas the major fraction of activity 60 min p.i. was observed in liver and intestines due to hepatobiliary clearance of the radiolabeled ligand. The chelators H.sub.3L3 and H.sub.3L26 demonstrated to be good lead candidates for the labeling of heat sensitive biomolecules with .sup.18F-fluorine and several derivatives have been synthesized.

New chelators such as H.sub.3L1, H.sub.3L2, H.sub.3L3, H.sub.3L26 and derivatives were synthesized for the complexation of {Al.sup.18F}.sup.2+. These new chelators are able to complex {AI.sup.18F}.sup.2+ with good radiochemical yields using a labeling temperature of 37 C. The stability of the new Al.sup.18F-complexes was tested in phosphate buffered saline (PBS) at pH 7 and in rat serum. AI.sup.18F-L3 and AI.sup.18F-L26 showed a stability comparable to that of the previously reported Al.sup.18F-NODA. Moreover, the biodistribution of Al.sup.18F-L3 and Al.sup.18F-L26 showed absence of in vivo demetallation since only very limited bone uptake was observed, whereas the major fraction of activity 60 min p.i. was observed in liver and intestine due to hepatobiliary clearance of the radiolabeled ligand. The chelators H.sub.3L3 and Al.sup.18F-L26 demonstrated to be a good lead candidates for the labeling of heat sensitive biomolecules with .sup.18F-fluorine and derivatives have been synthesized. We have explored the complexation of {AI.sup.18F}.sup.2+ with new chelators and obtained very favourable radiochemical yields (>85%) using a labeling temperature of 37 C. The stability of the new Al.sup.18F-complexes was tested in phosphate buffered saline (PBS) at pH 7 and in rat serum at 37 C., where AI.sup.18F-L3 and AI.sup.18F-L26 showed a stability comparable to that of the previously reported Al.sup.18F-NODA. Moreover, the biodistribution of Al.sup.18F-L3 and Al.sup.18F-L26 showed high stability, since only very limited bone uptakewhich would be an indication of release of fluorine-18 in the form of fluoridewas observed, whereas the major fraction of activity 60 min p.i. was observed in liver and intestines due to hepatobiliary clearance of the radiolabeled ligand. The chelators H.sub.3L3 and H.sub.3L26 demonstrated to be good lead candidates for the labeling of heat sensitive biomolecules with .sup.18F-fluorine and several derivatives have been synthesized.