Valerenic acid3569-10-6100 % similar 4-Ethyl-2-methyl-2-octenoic acid6975-97-937 % similar Artemisinic acid80286-58-437 % similar (E)-2-Methyl-2-pentenoic acid16957-70-333 % similar 2-Methylpent-2-en-1-oic acid3142-72-133 % similar cis-α,β-Dimethylacrylic acid565-63-933 % similar Tiglic acid80-59-133 % similar Citraconic acid498-23-731 % similar Mesaconic acid498-24-831 % similar Crocetin27876-94-431 % similar