<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Cutignano, Adele</style></author><author><style face="normal" font="default" size="100%">Seetharamsingh, B.</style></author><author><style face="normal" font="default" size="100%">D'Angelo, Daniela</style></author><author><style face="normal" font="default" size="100%">Nuzzo, Genoveffa</style></author><author><style face="normal" font="default" size="100%">Khairnar, Pankaj V.</style></author><author><style face="normal" font="default" size="100%">Fusco, Alfredo</style></author><author><style face="normal" font="default" size="100%">Reddy, D. Srinivasa</style></author><author><style face="normal" font="default" size="100%">Fontana, Angelo</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Identification and synthesis of mycalol analogues with improved potency against anaplastic thyroid carcinonia cell lines</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Natural Products</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">APR</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">80</style></volume><pages><style face="normal" font="default" size="100%">1125-1133</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The marine metabolite mycalol (1) has a specific inhibitory activity on cells of anaplastic thyroid carcinoma (ATC), a very aggressive and rare cancer that does not have effective conventional therapy. In this study, we describe six new related analogues (2-7) that differ in the length of the terminal alkyl residue and the presence of acetate or 3S-hydroxybutyrate (3S)-3HB as a substituent at C-19. Despite the structural' analogies, some of the new members were significantly more-cytotokic than 1 on cell lines,derivecl from human ATC. Structures inclusive of the 2'R,3R,4S,7R,8S,19R absolute configuration were asigned to 2-7 on the basis of detailed spectroscopic analysis, synthesis of different isomers, and application of ECD and Mosher's methods. This work led to the identification of mycal61-578 (3) as the most potent analogue, with an IC50 of 2.3 mu M on FRO cells:</style></abstract><issue><style face="normal" font="default" size="100%">4</style></issue><work-type><style face="normal" font="default" size="100%">Article</style></work-type><custom3><style face="normal" font="default" size="100%">Foreign</style></custom3><custom4><style face="normal" font="default" size="100%">3.662</style></custom4></record></records></xml>