... Volume: Page: ... Organic Letters. ... The peak at δ 5.8 ppm is assigned to the natural product, 6 (and its anomer), based on analogy with 6 bound to the V. harveyi receptor LuxP (6.1 ppm), 7 6 released from the LuxP receptor (δ 5.8 ppm), 2 6 (δ 5.8 ppm) observed ...