New triterpene aglycon from the holothurian Duasmodactyla kurilenis

Under the conditions of the mild acid hydrolysis of the sum of the triterpene glycosides from the holothurianDuasmodactyla kurilenis a new genin has been obtained the structure of which has been determined as 16,20(S)-diacetoxy-4,4,14-trimethylpregn-9(11)-en-3-ol by IR, UV, and mass spectroscopy, and high-resolution¹³C and¹H NMR.Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Academy of Sciences of the USSR, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 359–361, May–June, 1989.