(1S,2R,5S,6S,20R,21S)-11-chloro-21-hydroxy-12,20-dimethoxy-2,5,9,16-tetramethyl-8,23-dioxo-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1~10,14~.0~3,5~]hexacosa-10(26),11,13,16,18-pentaen-6-yl (2S)-2-[methyl(3-methylbutanoyl)amino]propanoate (non-preferred name (52978-27-5)

Identification
Name:	(1S,2R,5S,6S,20R,21S)-11-chloro-21-hydroxy-12,20-dimethoxy-2,5,9,16-tetramethyl-8,23-dioxo-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1~10,14~.0~3,5~]hexacosa-10(26),11,13,16,18-pentaen-6-yl (2S)-2-[methyl(3-methylbutanoyl)amino]propanoate (non-preferred name
Synonyms:	MAYTANVALINE;52978-27-5;NSC 219970;Maytansine, N(2')-deacetyl-N(2')-(3-methyl-1-oxobutyl)- (9CI)
CAS:	52978-27-5
Molecular Formula:	C₃₇H₅₂ClN₃O₁₀
Molecular Weight:	734.2759
InChI:	InChI=1/C37H52ClN3O10/c1-20(2)14-30(42)40(7)23(5)34(44)50-29-18-31(43)41(8)25-16-24(17-26(47-9)32(25)38)15-21(3)12-11-13-28(48-10)37(46)19-27(49-35(45)39-37)22(4)33-36(29,6)51-33/h11-13,16-17,20,22-23,27-29,33,46H,14-15,18-19H2,1-10H3,(H,39,45)/b13-11+,21-12-/t22-,23+,27+,28-,29+,33?,36+,37+/m1/s1
Molecular Structure:
Properties
Flash Point:	501.8°C
Boiling Point:	906.2°C at 760 mmHg
Density:	1.28g/cm³
Refractive index:	1.58
Flash Point:	501.8°C
Safety Data