robots.txt wildcard syntax?

is this syntax ok?

[maha]

I have thousands of these similar url's (see below) that needs to be eliminated from Google index, to avoid duplicate content.

/category6_7/product23/product_info.html
/category2_10/product636/product_info.html
/category77_33/product1171/product_info.html
/category23_35/product705/product_info.html

Is this the correct syntax for robots.txt?

Disallow: /category*/product*/product_info.html


I want to make sure before I make it live.

thanks for your help in advance..

[g1smd]

It might be.

Disallow: /*/product_info.html

OR

Disallow: /category*/product_info.html

might also be right.

[maha]

I'm trying to eliminate duplicate content with these "good" url's:

/product23/product_info.html
/product636/product_info.html
/product1171/product_info.html
/product705/product_info.html

so I want to be very careful with my wildcards.. ;-)

[g1smd]

I'd use the last one:

Disallow: /category*/product_info.html

[maha]

Thanks for your help..