Can't extract timestamp from multi-timestamp csv file

[sarumjanuch]

Need help, i have log file kind of:
"INT","INT","INT","VARCHAR","""VARCHAR"" ","VARCHAR","VARCHAR","VARCHAR",VARCHAR,,,VARCHAR,VARCHAR,"2013-09-19 09:29:53","2013-09-19 09:29:55","2013-09-19 09:34:50",297,295,VARCHAR,VARCHAR,"1379597393.479905",""

i neet to set my timestamp as first time field: "2013-09-19 09:29:53" is there any way to tell on what position my timestamp?? Or maybe any other way to do this? Previous field is not good idea to regexp, because it can be string with digits in any order and with any legth.
Thank you!

[sarumjanuch · Accepted solution]

Finaly found resolution:
TIME_PREFIX=^([^,]*,){Position of needed field}