(4-nitrophenyl) hexadecanoate hexadecanoic acid (4-nitrophenyl) ester palmitic acid (4-nitrophenyl) ester 1492-30-4 Hexadecanoic acid, 4-nitrophenyl ester ST5331306 Hexadecanoic acid 4-nitrophenyl ester N2752_SIGMA p-Nitrophenyl palmitate 4-Nitrophenyl palmitate EINECS 216-084-9