. _:b8069352 . _:b12946302 . . _:b14121077 . _:b8441842 . _:b4657477 . _:b12376411 . _:b13582001 . _:b10421594 . _:b7298608 . "2D NMR"@en . _:b12402908 . "4" . _:b6942483 . . _:b9886452 . _:b13569566 . _:b10235671 . _:b8111511 . _:b9189784 . _:b14230167 . _:b13353621 . _:b8334052 . _:b14250344 .