SEARCH Articles Figures Tables 4-4" Oxybis benzene sulfonyl hydrazide Aldehydes sulfonyl hydrazides BENZENE SULFONYL HYDRAZIDE Hydrazide sulfonyl hydrazine Hydrazides sulfonyl hydrazine P-Toluene sulfonyl hydrazide Sulfonyl hydrazide Sulfonyl hydrazide Texas Red sulfonyl chloride hydrazide derivative