Dr. Crock's claims {have not been [corroborated by other scientists or published in a prestigious journal] but have nonetheless garnered a great deal of attention from the public}.
但我觉得应该是
Dr. Crock's claims { not have been [corroborated by other scientists or published in a prestigious journal] but have nonetheless garnered a great deal of attention from the public}.
这样or引导[ ]中的平行corroborated & published，not but引导{ }中的平行 not have been & but have garnered
不明白答案中have not been 和but have garnered 怎么平行呢？求大神解答 谢谢！