Admin panel absent

I have removed the site address http://www.greenmedicalcorner.com/ from the wordpress setting. Now the admin login page is absent.When I try to enter the http://www.greenmedicalcorner.com/wp-admin into the addres bar it goes to http://www.greenmedicalcorner.com/rheumatoid-arthritis/wp-login.php?redirect_to=http%3A%2F%2Fwww.greenmedicalcorner.com%2Fwp-admin%2F&reauth=1
It changes the site view and I can’t enter the admin login page.So Please help me.