Kolangal song Mouna ragam-karnataka suddha saveri - is definitely, a well established one Carnatically ragamwise. I hope the lyric is written by IR himself, since I find the word “Nyaana Desiganai” in the last line of Charanam, I guess that way.
(I only proceeded from where our friend Vel Ramanan established that this is not Malahari, then I got into the verification process.)
Mouna Ragam from Kolangal in Karnataka Suddha Saveri
Listen to the song here :
http://thiraipaadal.com/tpplayer.asp...9'&lang=en
The lighter version of this raga is in still older one :Amma Endru from Devotional Album IR - Geetha Vazhipaadu:
Listen to the song here :
http://thiraipaadal.com/tpplayer.asp...4'&lang=en