1-Naphthalenecarboxylic acid, 8-(acetyloxy)-5-(2-(2,5-dihydro-5-oxo-3-furanyl)ethyl)decahydro-5,6,8a-trimethyl-, methyl ester, (1R-(1alpha,4abeta,5beta,6alpha,8alpha,8aalpha))- 82225-47-6 Ajugarin IV