I found two possible names for A. Zajdenfeld.
Abram Chaskiel Zanjdenfeld b. 14/10/1925 and lived at Bier 24 and Korn 9 12 and he was deported on 25/02/1942 on TR 4/2.
Abram Zanjdenfeld b. 22/08/1922 and he lived at Insel 35 9 and Magister 14. Also note the ghetto note "Zur Arb AG 28.6.1944" I'm not sure what this refers too?
Abram b. 1922 was the son of Ester Zajdenfeld b. 1892 and the brother or cousin of Berta Zajdenfeld b. 01/04/1920. According to Abram's ghetto note "Zur Arb Ab 28.6.1944" refers to ZUR ARBEIT (TO WORK.) So I checked the secondary sources and found 28 Jun 1944 transport from Lodz to Chelmno and transport # III was killed in the gas vans. I checked on Jewishgen.org and found that Abram was on transport #469.
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Abram b. 1925 was the son of Chana Frajndla Zajdenfeld b. 1890 and he was the sibling/cousins of Chana b. 21/01/1918, Basia 22/12/1922, Perla b. 15/11/1929, Luba Frandla 29/12/1924, and Lewi Icchock b. 02/03/1927. They were all deported on TR 4/2 on 25/02/1942. According to the secondary resources the family were sent to Chelmno where they were killed in the gas vans.