| abstract |
Revealing the compound of formula 1, And pharmaceutically acceptable salts thereof, wherein R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , X 1 , and X 2 are defined in the specification. This disclosure also pertains to materials and methods for preparing compounds of formula 1; pharmaceutical compositions containing such compounds of formula 1; and their use in the treatment of diseases, disorders, and conditions associated with PHD. |