155111-90-3 2,4-Pentadienoic acid, 5-(1,2,4a,5,6,7,8,8a-octahydro-2,6,8-trimethyl-1-oxo-2-naphthalenyl)- 5-(3-Ene-1-oxo-2,6,8-trimethyldecalin-2-yl)-2,4-pentadienoic acid Hynapene C