A Revised Structure of Tomatillidine

Chemical studies have shown that tomatillidine and dihydrotomatillidine, steroidal alkaloids obtained from Solanum tomatillo, are described in revised structures 1a and 2a instead of the old structures 1b and 2b. An isomerization of △22 (N)-22, 26-imino-23-one moiety to △23 (N)-23, 26-imino-22-one is a major topic.