Ss spectrum [tR = 54.34 min, m/z 270 (M+, 23), 239 (one hundred), 211 (53), 196 (57), 168 (34), 152 (8), 139 (19)] with the regular methyl
Chemexpress Ss spectrum together with the standard methyl trans-4-(1-methoxy-2-naphthyl)-2oxobut-3-enoate. P7 was located within the cultures on day four and 7, but not in day 14 (data not shown). The mass spectrum…