Thirteen new compounds of the alkyl styryl indoline spirobenzopyrans were synthesized from the condensation of 2-methylene indoline with the designed salicylaldehyde.
The synthesis of tridecane dicarboxylic acid diethyl ester with ethyl alcohol and tridecane dicarboxylic acid as reactants and cation exchange resin as catalyst had been studied.
Of the 13 tombs of Souther Dynasties, the structures of the coffin chamber and the burial objects are similar to those of the cotemporary tombs discovered in Guangdong Province.
In chapter thirteen, Aristotle outlines an ideal of the central character of tragedy, the so-called tragic hero, and identifies the source of the character's downfall with something called hamartia.
The results showed that the major component of the crude product was the desired tridecapeptide and the main by-products were derived from the oxidation or deformity of the desired peptide.
Nimbarka, a Telugu Brahman of the 12th or 13th century, spread the cult of the divine cowherd and his favourite gopi (cowherdess, especially associated with the legends of Krishna's youth), Radha.
家庭第十季_Modern Family-Season10 
英语 
啉和取代水杨醛缩合得到
二元酸与乙醇为原料合成
--悲剧主人公的理想，并指出该
早在
