Now recall that carbosilic acids possess a carbonyl carbon connected to a hydroxyl group. So your hydroxyl group is an OH group, so we have a carbonyl connected to OH. Now, the set of rules for naming carbosilic acids are similar to aldehydes. That's because just like an aldehyde, the carbonyl carbon in this case of a carbacillic acid is always numbered 1.
Now here we're going to modify the E ending of the original alkane to OIC acid because it's no, it's not an alkane, it's a carbosolic acid. So E becomes OIC acid, our naming convention. We still have to give the locations of our different substituent. Our parent chain would be modified from an E ending to OIC acid. So keep this in mind as we start naming different types of carbosolic acids.