5-oxazolecarboxylic acid, 4-heptyl-4,5-dihydro-2-phenyl-, 1,1-dimethylethyl ester, (4R,5S)- InChI=1/C21H31NO3/c1-5-6-7-8-12-15-17-18(20(23)25-21(2,3)4)24-19(22-17)16-13-10-9-11-14-16/h9-11,13-14,17-18H,5-8,12,15H2,1-4H3/t17-,18+/m1/s tert-butyl rel-(4R,5S)-4-heptyl-2-phenyl-4,5-dihydro-1,3-oxazole-5-carboxylate