Sorry Sir, The indian railways site says that it has SL class: See below:
You Queried For
Train Number Train Name Date
(DD-MM-YYYY) Source Station Destination Station Quota Code
2640 BRINDAVAN...
more... EXP 28-09-2010 BANGALORE CY JN CHENNAI CENTRAL GENERAL
S.No. Date (DD-MM-YYYY) Class - SL Class -2S
1 28- 9-2010 REGRET/WL 1 AVAILABLE 471
2 29- 9-2010 REGRET/WL 1 AVAILABLE 526
3 30- 9-2010 REGRET/WL 1 AVAILABLE 645
4 1-10-2010 REGRET/WL 1 AVAILABLE 289
5 2-10-2010 REGRET/WL 1 AVAILABLE 440
6 3-10-2010 REGRET/WL 1 WL 149/WL 123
Also, the same is mentioned here also:
http://erail.in?T=SBC::MAS:
/train/seats/228/136/35Please check.