Is there a way to transform this list into proper data.frame or DT ?

I perform GET() data from OpenFDA api. As a response, I get

library(rjson)
library(RCurl)
library(httr)
library(dplyr)

response <- GET("https://api.fda.gov/drug/label.json?search=(effective_time:[20180101+TO+20200922])+AND+AstraZeneca&limit=900")
content <- fromJSON(rawToChar(response$content))
res <- content$results
rawData <- as.data.frame(do.call(rbind, res)) 

Need your help to transform rawData into proper table, data.frame or DT format so I can select only the necessary columns.

Much appreciated

The content$results object is large and multi-layered, and difficult to work with in its current form. Try the openfda package.