The present invention relates to a compound represented by the following formula:
(I) or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable solvate thereof, or a combination thereof, wherein R
o
, R
1
, R
1′
, R
2
, R
2′
, R
3
and n are defined herein. The present invention further relates to a method of treating a patient from endometreosis or uterine fibroids.