Remove a Varying Substring from a Character column

I have a dataframe that looks like so:

                                                                  Item Quantity Price Totals
1                                  24" Box Desert Museum (14" Caliper)       10    92    920
2                                     24" Box Mastic tree (1" Caliper)       28   135   3780
3                              36" Box Thornless Mesquite (2" Caliper)        9   335   3015

I am trying to remove the the parentheses, along with what is inside of it. In the end, I want it to look like so:

                                                                  Item Quantity Price Totals
1                                                24" Box Desert Museum       10    92    920
2                                                  24" Box Mastic tree       28   135   3780
3                                           36" Box Thornless Mesquite        9   335   3015

The issue I am having is not so much about removing the parentheses and its contents, its the fact that the number varies in digits, which makes every case slightly different form each other.

>Solution :

Assuming the term in parentheses always occur at the end of the item description, we can use sub() as follows:

df$item <- sub("\\s*\\(.*?\\)$", "", df$item)

We can also use str_replace to do this the stringr way:

df$item <- str_replace(df$item, "\\s*\\(.*?\\)$", "")