15. Colouring matters of the Aphididæ. Part XXII. Nuclear magnetic resonance evidence of the structures and conformations of the naphthaquinone dimethyl ethers derived from the protoaphins, and of the erythroaphins

Abstract

D. W. Cameron, D. G. I. Kingston, N. Sheppard and L. Todd, J. Chem. Soc., 1964, 98 DOI: 10.1039/JR9640000098