Borrelidin Cyclopentanecarboxylic acid, 2-(7-cyano-8,16-dihydroxy-9,11, Cyclopentanecarboxylic acid, 2-[(2S,4E,6Z,8R,9S,11R,13S,15S, 16S)-7-cyano-8,16-dihydroxy-9,11,13,15-tetramethyl-18-oxooxacyclooctadeca-4,6-dien-2-yl]-, (1R,2R)- NSC271295