Patent ID: 11912707
Assignee: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK
Field: Pharmaceuticals (Chemistry)
Classification: CPC C  A | IPC A  C

Claim 0:
1. A compound having the structure:, wherein
X is N or NH;
R1 is —OH, —O-alkyl, —O(CO)-alkyl or is absent;
R2 is —H or -alkyl;
R3 is —H or -alkyl;
R4 is —H or -alkyl;
α is a bond and is absent or present;
β is a bond and is absent or present; and
χ is a bond and is absent or present,
wherein when α is absent, β is present, χ is absent, X is NH and R1 is absent, and
wherein when α is present, β is absent, χ is present, X is N and R1 is present,

or a pharmaceutically acceptable salt or ester thereof.