MOESM14 of Designed biosynthesis of 25-methyl and 25-ethyl ivermectin with enhanced insecticidal activity by domain swap of avermectin polyketide synthase ZhangJi YanYi-Jun AnJing HuangSheng-Xiong WangXiang-Jing XiangWen-Sheng 2015 Additional file 14: Figure S12. HSQC spectrum of compound 2.