(2S)-2-Methoxy-12-methyloctadec-17-en-5-ynoic acid 17-octadecen-5-ynoic acid, 2-methoxy-12-methyl-, (2S)- 2-Methoxy-12-methyl-octadec-17-en-5-ynoic acid 2-methoxy-12-methyloctadec-17-en-5-ynoic acid InChI=1/C20H34O3/c1-4-5-6-12-15-18(2)16-13-10-8-7-9-11-14-17-19(23-3)20(21)22/h4,18-19H,1,5-8,10,12-17H2,2-3H3,(H,21,22)/t18?,19-/m0/s Stellettic acid A