Patent ID: 8680143

Claim:
A composition comprising a compound of Formula I, a tautomer thereof, or a pharmaceutically acceptable salt thereof; wherein each of R 1 , R 2 , R 3 and R 4 is selected from the group consisting of H, CH 3 and —C(═O)R n ; and R n from —C(═O)R n is an alkyl or alkenyl group having 12 to 30 carbons, said alkenyl group having one or more double bonds; wherein at least one of R 1 , R 2 , R 3 and R 4 is —C(═O)R n and at least three of R 1 , R 2 , R 3 and R 4 are H or —C(═O)R n , and wherein each wavy line represents a single bond or a double bond.