Notation for infinite product in reverse order This question is related to notation of infinite product. 
We know that,
$$
\prod_{i=1}^{\infty}x_{i}=x_{1}x_{2}x_{3}\cdots
$$
How do I denote
$$
    \cdots x_{3}x_{2}x_{1}  ?   
$$
One approach could be 
$$
\prod_{i=\infty}^{1}x_{i}=\cdots x_{3}x_{2}x_{1}
$$
I need to use this expression in a bigger expression so I need a good notation for this. Thank you in advance for your help. 

(With tongue in cheek:) what about this?
$$\left(x_n\prod_{i=1}^\infty \right)\;$$
