UK 1

Formula : C22-H14-N2-O5
CAS : 151271-53-3 

A cytotoxic metabolite from Streptomyces sp. 517-02.

UK 39671

Formula : C17-H22-Cl2-N2-O
CAS : 85473-17-2 

UK 67254-13 is the (+)-isomer; UK 67255-13 is the (-)-isomer; inhibits cytochrome P-450(CAM).